| 35 Rows |
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 Adamsite-(Y)
Tufts of adamsite (a hydrated yttrium sodium rare-earth carbonate) with pink rhodochrosite and aegirine on an albite matrix thumbnail from the type locality for this recently-discovered (1999) mineral of the Poudrette Quarry, Mont St. Hilaire, Rouville County, Québec, Canada. Thanks to Jonathan Levinger for the specimen! | |
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 Ancylite
A vein of pink massive ancylite (a hydrated cerium strontium hydroxycarbonate) in matrix comprises this pretty miniatute from the Dark Star Mine, Alta, Rivalli County, Montana. This is actually ancylite-(Ce), the cerium-rich end member - ancylite-(La), where lanthanum replaces part of the cerium, is the other end member. It also forms an incomplete series with calcio-ancylite-(Ce) and calcio-ancylite-(La) where calcium replaces the strontium and with gysinite-(Nd) where lead replaces the strontium and lathanum and neodymium replace the cerium. Thanks to Steve & Susan Bringe's (Summit Minerals) auction on eBay for the specimen and the image! |
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 Ancylite
A thumbnail of violet ancylite sprays on feldspar from the Poudrette Quarry, Mont St. Hilaire, Québec, Canada. Thanks to Val Collins' auction on eBay for the specimen and the image! |
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| Row 2 |
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 Ankerite
A small cabinet specimen of very nice tan crystals of ankerite (a calcium iron carbonate) on limestone from the abandoned mines at Bellmunt, Tarragona, Catalonia, Spain. The closeup (larger image, bottom) shows a layer of either pink kutnohorite or manganocalcite. Ex Joe Cilen Collection and 1955 Scott J. Williams Collection. It forms two series; one with dolomite and one with kutnohorite. Thanks to David H. Garske's (MINERALS and MORE) auction on eBay for the specimen! |
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 Artinite
An old miniature of artinite (a hydrated magnesium hydroxycarbonate) from the classic locale of Staten Island (Richmond County), New York City, New York. Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen and the image! |
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 Artinite
Another Staten Island artinite - this thumbnail has some hydromagnesite with it on the serpentine matrix. They're both alteration products of serpentine. Thanks to the Carnegie Natural History Museum Store for the specimen! |
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| Row 3 |
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 Artinite
An artinite (on hydromagnesite) that's NOT from Staten Island! This thumbnail's from the Albano Hills, Rome Province, Latium, Italy. Thanks to Kerry Day's (Kaygeedee Minerals) auction on eBay for the specimen! |
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 Artinite
This beautiful large miniature of snow-white artinite on pale-green serpentine is from the New Idria Serpentine mass, New Idria District, Diablo Range, San Benito County, California. Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen and the images! | |
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 Barbertonite
A nice thumbnail of lavender barbertonite (a hydrated magnesium chromium hydroxycarbonate) fibers on serpentine from the type locality of the New Amianthus Mine, Kaapsche Hoop, Barberton District, Mpumalanga Province, (Transvaal), South Africa. Some references replace some of the chromium with aluminum. Barbertonite may soon be discredited as recent analyses (2011) have shown it to be the -2H (hexagonal) polytype of stichtite. Thanks to David H. Garske's (MINERALS and MORE) auction on eBay for the specimen and the image! | |
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| Row 4 |
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 Benstonite
A thumbnail of a benstonite (a barium strontium calcium manganese magnesium compound carbonate) cluster on a calcite matrix from the Minerva #1 Mine, Cave in Rock, Hardin County, Illinois. Thanks to Tony Jones' auction on eBay for the specimen! |
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 Bismutite
Bismutite (bismuth oxycarbonate or subcarbonate) occurs here as greenish crusts overlaying bismuthinite-induced cracks in massive smoky quartz. This miniature comes from the famous pegmatite outcropping at Bedford, Westchester County, New York. Thanks to Emilie & Ron Kendig's auction on eBay for the specimen! |
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| Row 5 |
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 Burbankite
A thumbnail of pinkish-orange burbankite (a strontium barium carbonate) in matrix from Khibiny, Kola Peninsula, Russia. Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen! |
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 Coalingite
A miniature of brassy-brown coalingite (a hydrated magnesium iron hydroxycarbonate) scales on a serpentine matrix from the type locality of the Union Carbide Mine, San Benito County, California. Thanks to Tony Nikischer at the Excalibur Mineral Company for the specimen! | |
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 Dawsonite
This is a beautiful small cabinet specimen of white radial dawsonite (an aluminum sodium hydroxycarbonate) on matrix from Tenés, Algeria. It has an old J. Bardet label. Thanks to Thomas Bee's auction on eBay for the specimen and the images! | |
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| Row 6 |
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 Dawsonite, var.
Chromian Dawsonite
A beautiful miniature of chromian dawsonite (where chromium replaces some of the aluminum) from Valle Benedetta, Livorna, in Tuscany, Italy. Thanks to Diane & David Piccioli's auction on eBay for the specimen and the images! |
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 Defernite
A pretty thumbnail of reddish-brown defernite (a complex calcium hydroxycarbonate with silicate and chloride cations) blades on microcrystalline hausmannite from the Kombat Mine, Otavi Mountains, Namibia. Thanks to Richard Dale's (Dale Minerals International) auction on eBay for the specimen! |
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 Desautelsite
An esthetic small cabinet specimen of orange desautelsite (a hydrated magnesium manganese hydroxycarbonate), white artinite, and green serpentine from the Artinite Pit, Clear Creek area, New Idria District, San Benito County, California. |
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| Row 7 |
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 Dolomite
The pink color is due to a trace of manganese and there are tiny crystals of chalcopyrite on this gray limestone matrix specimen from the dolomite quarry at Black Rock, Lawrence County, Arkansas. the crystals have the typical pearly luster and curved faces common to this locality. Dolomite's named after Deodat deDolomieu, a French geologist, who first described it to Napoleon Bonaparte during their visit to Egypt in 1798. |
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 Dolomite
The dolomite has a dusting of pyrite on the top surfaces - some of the pyrite has tarnished to a bluish green. This miniature's from Cornwall, England. Thanks to Dan Wienrich at Dan & Jill Weinrich for the specimen and the image! |
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 Dolomite
A cute miniature of (probably) a dolomite rose on scalenohedral calcite on matrix from an unknown locale. Thanks to Dieter Obrecht's auction on eBay for the specimen and the images! |
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| Row 8 |
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 Dolomite, var.
Cobaltoan Dolomite
Hot pink cobaltoan dolomite from the Shaba Crescent, Congo. The dark specks are very dark green malachite. |
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 Dolomite, var.
Cobaltoan Dolomite
Another cobaltoan dolomite from the Shaba Crescent - the crystals on this one are more equant and deeper in color. Some of them even look faceted (an octagon cut table, at least). As deep a color as this is, the very rare sphaerocobaltite (cobalt carbonate) is even deeper. | |
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 Dolomite, var.
Cobaltoan Dolomite
This miniature is even closer to pure sphaerocobaltite - the crystals are very strongly colored. It's also from Kolwezi, Shaba, Congo. Thanks to Donna Lee Hanlon's (Donna's Treasures) auction on eBay for the specimen! | |
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| Row 9 |
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 Dolomite, var.
Ferroan Dolomite
Iron can substitute for some of the magnesium in dolomite - this beautifully-colored thumbnail is from the Vekol Mine, Pinal County,
Arizona. Reference: Mineralogical Record, Vol. 14, No. 2 (Mar / Apr), Pg. 91 - Ex: D.M. Shannon Collection. Thanks to Richard Dale's (Dale Minerals International) auction on eBay for the specimen! | |
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 Dolomite, var.
Nickelian Dolomite
Nickel can also substitute for the magnesium in dolomite as seen in this micro from the 132 North Mine, Widgiemooltha, Western Australia. Ex: R. John Reeve Collection. Thanks to Chris Auer's (Eureka Micromounts) auction on eBay for the specimen and the image! |
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 Dolomite,
var. Teruelite
As the iron content increases, ferroan dolomite becomes black - this miniature of sharp teruelite on gypsum is from Chelva, Valencia, Spain. Thanks to Jesus Claramunt's auction on eBay for the specimen and the images! |
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| Row 10 |
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 Dresserite
An excellent miniature of spherical dresserite (hydrated barium aluminum hydroxycarbonate), hexagonal weloganite prisms, and calcite on matrix from the type locality of the Francon Quarry, Montréal, Québec, Canada. The larger image shows the association under SUV (bottom left) and LUV (bottom right). Thanks to Nicole Gariepy's auction on eBay for the specimen and the fluorescence images! | |
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 Dypingite
An excellent miniature of dypingite (a hydrated magnesium hydroxycarbonate) spherules on matrix from the Artinite Pit, Clear Creek area, New Idria District, San Benito County, California. It's one of 300 or so minerals whose structure has not been determined. Thanks to Kyle Smith's auction on eBay for the specimen and the image! |
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 Dypingite, var.
Yoshikawaite
An excellent micromount of yoshikawaite (a hydrated magnesium hydroxycarbonate) spherules on matrix from the Brosso Mine, Cálea, Léssolo, Canavese District, Torino Province, Piedmont, Italy. Until somebody analyzes dypingite and yoshikawaite down to the structural level, we won't know if these two minerals are the same. The (possible) formula for yoshikawaite is an octahydrate while dypingite is a pentahydrate. Thanks to Sönke Stolze's auction on eBay for the specimen and the image! |
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| Row 11 |
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 Gaspéite
Massive crystalline gaspéite (a nickel magnesium iron carbonate - the green color comes from the nickel) from the type locality of the Gaspé Peninsula, Lemieux Township, Gaspé-Ouest County, Québec, Canada. It forms a series with magnesite. Thanks to Tony Nikischer at the Excalibur Mineral Company for the specimen! | | |
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 Gaspéite
A bright apple green slab of stabilized gaspéite from Australia. Most of the gaspeite that's cabbed for jewelry (with a protective coating) comes from Australia. Thanks to Lenora Salandi's auction on eBay for the specimen! | |
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 Giorgiosite
A micro (core sample) of white giorgiosite (a hydrated magnesium hydroxycarbonate) from the Korshunovskoye deposit, Irkutsk, Eastern-Siberia, Russia. The water of hydration varies from 4 - 6 molecules and the mineral is "inadequately described" according to MinDat, but this particular sample was analysed by both SEM / EDS and XRD. Thanks to Csanad Loranth's auction on eBay for the specimen and the images! |
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| Row 12 |
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 Horvathite-(Y)
An excellent horvathite (yttrium sodium carbonate fluoride) crystal cluster micro from the type and only locality of the Poudrette QuarryMont Saint-Hilaire, Quebec, Canada. Thanks to Darrel Merke's (Proton Minerals) auction on eBay for the specimen and the images! | |
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 Hydrodresserite
A nice miniature of hydrodresserite (barium aluminum hydroxycarbonate trihydrate) balls with dresserite prisms on quartz from the type and only locality of the Francon Quarry, Montreal, Quebec Canada. Ex: M. W. Swanson Collection (Leyden, MA), CA-199 Thanks to Kristen Burgess' auction on eBay for the specimen! | |
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 Hydromagnesite
Small white puffballs of hydromagnesite (a magnesium hydroxycarbonate) on serpentine comprise this thumbnail from Lee Valley, Nelson, New Zealand. It was collected in the mid-1970s. Thanks to Toby Page's auction on eBay for the specimen! |
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| Row 13 |
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 Hydrotalcite
Rare excellent (for the species) crystals of hydrotalcite (hydrated magnesium aluminum hydroxycarbonate and the dimorph of manasseite) on matrix - this miniature comes from Straden, Styria, Austria. Thanks to Chris Auer's (Eureka Micromounts) auction on eBay for the specimen and the image! |
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 Kettnerite
A large micro of kettnerite (a bismuth calcium hydroxyfluorocarbonate) from the Blue Bell Mine, Baker, San Bernardino County, California. Thanks to Alexander Falster's auction on eBay for the specimen and the image! |
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 Kutnohorite
Kutnohorite (kutnahorite) is essentially calcium-rich rhodochrosite. It forms a series with both dolomite and ankerite. This thumbnail from the N'Chwanning Mine in the Kalahari Manganese Fields of South Africa is interesting under low light conditions (larger image, bottom row) - the kutnohorite habit appears to gather the light at the surface! Thanks to Craig Ackermann's (KalahariMinerals.com) auction on eBay for the specimen! | |
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| Row 14 |
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 Kutnohorite
Another thumbnail of kutnohorite from the N'Chwaning Mine, Kalahari Manganese Field, Kuruman, Northern Cape, Republic of South Africa. This one consists of divergent bundles of light pink fibrous crystals. It also fluoresces a bright reddish-orange under longwave UV. Thanks to Steiner's Rockshop auction on eBay for the specimen and images! | |
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 Kutnohorite
An interesting large thumbnail of brown kutnohorites on aragonite needles in a geode, probably from the Santa Barbara Mine, Val d'Arno, Arezzo Province, Tuscany. The aragonite fluoresces a pale yellow. Ex: Ralph Heitman Collection. Thanks to Walter Mroch's auction on eBay for the specimen! | |
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 Magnesite
A very nice, sharp cluster of magnesite rhombs comprise this small cabinet specimen from the Brumado Mine, Bahia, Brazil. Thanks to Alexander Falster's auction on eBay for the specimen! |
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| Row 15 |
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 Magnesite
A beautiful small cabinet specimen of bright orange magnesite with a few crystals of specular hematite (larger image, right) onm matrix, also from Brumado. The Thanks to Lourenço Santos' auction on eBay for the specimen and the images! | |
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 Magnesite, var.
Breunnerite
Breunnerite (named after a Count Breunner of European royalty) is an intermediate member of the magnesite - siderite series, usually around 30% iron. It's also called walmstedtite or hallite. When the iron content is more than the magnesium, it becomes sideroplesite. This small cabinet specimen, with a vein of radiating fibrous breunnerite, comes from Shady, Polk County, Arkansas. Thanks to Robert Stoufer's auction on eBay for the specimen and images! |
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 Manasseite
A miniature of cream-colored manasseite (hydrated magnesium aluminum hydroxycarbonate and the dimorph of hydrotalcite) in matrix from the Zelentsovskaya Pit, Kusinsk Fe-Zn-deposit, Zlatoust, Ilmen Mts, South Urals, Russia. Thanks to the Fersman Mineralogical Institute's table at the 2002 Carnegie Gem & Mineral Show for the specimen! |
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| Row 16 |
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 Nesquehonite
and
Morenosite
A nice miniature of colorless nesquehonite (a hydrated magnesium hydroxycarbonate) tufts with light-green morenosite (nickel sulfate heptahydrate) crusts on matrix from Lavrion, Greece. Thanks to Chris Auer's (Eureka Micromounts) auction on eBay for the specimen! |
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 Parisite-(Ce)
An excellent thumbnail of greenish-brown parisite-(Ce) (a cerium lanthanum calcium fluocarbonate) crystals on ankerite from the Snowbird Mine, Fish Creek, Alberton, Mineral County, Montana. It forms a series with parisite-(Nd) where neodymium replaces some of the cerium. Thanks to John Sobolewski's auction on eBay for the specimen and the image! | |
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 Pyroaurite and
Sjogrenite
Tabular brown flakes of pyroaurite (a magnesium iron hydroxycarbonate) and its dimorph, sjogrenite, on massive calcite from the type locality of Långban, Filipstad, Vårmland, Sweden. There's also some black flakes of pinakiolite (a magnesium manganese oxyborate) present. Thanks to Emilie & Ron Kendig's auction on eBay for the specimen! Thanks also to Leif Engman for the pinakiolite identification! | |
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| Row 17 |
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 Reevesite
A small cabinet specimen of yellow-green reevesite (a hydrated nickel iron hydroxycarbonate) on a serpentine matrix from the Atlas Pit, White Creek, Fresno County, California. It's the nickel analog of pyroaurite and the iron analog of takovite, and like them, is a member of the Hydrotalcite group. Its also the carbonate analog of honessite. Thanks to Tony Jones' auction on eBay for the specimen! |
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 Remondite
The color change (larger photo) in this thumbnail of Mont St. Hilaire remondite, a rare sodium strontium rare-earth carbonate, is fantastic! It's named (1988) after Guy Remond, the French mineral physicist. Thanks to Daniel Comtois at Daniel Comtois - Quebec Minerals for the specimen and the image! | |
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 Rhodochrosite
Rhodochrosite is manganese carbonate, thus the pink color. Sometimes it occurs in reddish-pink facetable crystals, but more often, like here in this miniature from Argentina, it's in a massive, encrusted habit. It's a minor ore of manganese. |
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| Row 18 |
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 Rhodochrosite
Rhodochrosite crystals and a cluster of quartz from Peru. Thanks to Chris Korpi at Pangaea Minerals for the specimen! |
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 Rhodochrosite
Nice pink rhombs of rhodochrosite and micro pyrite cubes comprise this miniature, probably from the long-closed Emma Mine, Butte, Silver Bow County, Montana. |
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 Rhodochrosite
A miniature of rhodochrosite from the famous Sweet Home Mine in Alma, Park County, Colorado - there's quartz and pyrite (and other sulfides) in there as well. Thanks to Kevin Ward at the The Mineral Gallery for the specimen and the image! |
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| Row 19 |
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 Rhodochrosite
A miniature of deep pink rhodochrosite from the Uchucchacua Mine, Oyon Province, Lima Department, Peru. Thanks to Brian McManus's (Pebble Peddler) auction on eBay for the specimen and the image! |
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 Rhodochrosite
A single rhodochrosite rhomb thumbnail from Uchucchacua, Peru. Thanks to Anne & Charles Steuart's auction on eBay for the specimen! |
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 Rhodochrosite
The rhodochrosite in this typical specimen from Chihuahua, Mexico is in small radiating acicular clusters. |
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| Row 20 |
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 Rhodochrosite
Scalenohedral rhodochrosite with colorless fluorite on matrix from Uchucchacua, Peru. Thanks to Mike Keim at Marin Minerals for the specimen and the images! |
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 Rhodochrosite
A pretty little thumbnail of DeMix Quarry, Mont St. Hilaire, Quebec, Canada, reddish-brown rhodochrosite (the typical color from there) on a matrix along with black aegirine needles, (probable) darker brown manganneptunite, and an unidentified (possibly ancylite or ussingite) pink coating and crystals. Thanks to Tom Klinepeter's auction on eBay for the specimen! |
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 Rhodochrosite
A rhodo crystal from an old collection (Cape Province, South Africa) - the side view of the thumbnail appears to show either a twinned or parallel habit (the lighting illuminates them differently). |
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| Row 21 |
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 Rhodochrosite
Another rhodo crystal thumbnail from the Uchucchacua Mine in Peru. Thanks to Roger Hoek at ARCH Mineralsfor the specimen! |
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 Rhodochrosite
A polished nodule (miniature) of banded rhodochrosite from the famous Capillitas Mine, Andalgalá, Catamarca, Argentina. Thanks to Mike Shell's auction on eBay for the specimen! |
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 Rhodochrosite
This is an odd thumbnail of rhodochrosite over a black unknown from Uchucchacua, Peru. Thanks to Emilie & Ron Kendig's auction on eBay for the specimen! |
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| Row 22 |
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 Rhodochrosite
A tiny reddish-brown rhodochrosite rosette from Mont St. Hilaire, Quebec, Canada. I tweaked the color on this one a bit. Thanks to Alexander Falster's auction on eBay for the specimen and the image! |
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 Rhodochrosite
A small cabinet drusy rhodochrosite with small ilvaite crystals from Level 5 of the Los Remedios Mine, Taxco, Guerrero, Mexico. Thanks to Cathy Krismanits' (Southwestern Sales) auction on eBay for the specimen! |
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 Rhodochrosite
A beautiful miniature of gemmy scalenohedral rhodochrosite crystals on matrix from Ica Ica Province, Huancavelica Department, Peru. Thanks to Bill Kohout's auction on eBay for the specimen and the image! | |
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| Row 23 |
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 Rhodochrosite
Thirteen tumbled "Inca Rose" rhodos from the famous occurence at the Capillitas Mine, Andalgalá, Catamarca, Argentina. Thanks to Eduardo Jawerbaum's auction on eBay for the specimen and the image! |
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 Rhodochrosite
The Sequoia Pit at the Lone Tree Mine in Humboldt County, Nevada produces these very unusual spherical rhodos - this miniature also has micro barites (larger image, top right) and a stacked tabular unidentified cluster (larger image, bottom right) on the romanechite matrix. Thanks to Keith Hayes' (KQ's Minerals) auction on eBay for the specimen! | |
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 Rhodochrosite
This large thumbnail of waterworn translucent rhodochrosite is often called "gel rhodo" in the jewelry trade - it's often cabbed or carved. Thanks to Glen Morgan's auction on eBay for the specimen! |
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| Row 24 |
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 Siderite
Complexly-faced siderite crystals with calcite comprise this miniature from Kamsdorf, Saalfeld, Thurigen, Germany. Thanks to Dave Hayward at A Lucky Strike Mineralsfor the specimen and the image! |
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 Siderite
This very rare greenish-brown hexagonal prismatic (with pinacoids!) siderite miniature comes from Rapid Creek, Yukon Territory, Canada - the closeup images show the olive green translucency of the crystals. As with most siderites, it's slowly altering to limonite - these siderites alter so (relatively) quickly that only a few were ever on the market. The larger image also shows (top, right) some probable wardite crystals on the bottom of the specimen. Thanks to Kevin MacNelly's (Geodeland) auction on eBay for the specimen! Thanks also to Gilles & Jacques Poulin for confirming the identity and location and describing the rarity of this specimen! |
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 Siderite
on Pyrite
A saddle-shaped siderite on pyrite miniature from the Eagle Mine (closed since '78), Gilman, Eagle County, Colorado. Thanks to Rory Howell's auction on eBay for the specimen and the image! | |
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| Row 25 |
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 Siderite
A large thumbnail of sharp brown siderite on matrix from Arizona. Thanks to Jean & Audrey's (alko) auction on eBay for the specimen! |
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 Siderite
A beautiful small cabinet piece of ball siderite on a calcite matrix from the Second Sovietsky Mine, Dal'Negorsk, Primorskiy Kray, Russia. Thanks to Eric Greene's (Treasure Mountain Mining) auction on eBay for the specimen and the images! | |
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 Siderite
A thumbnail of intergrown green siderite rosettes from Santa Eulalia, Chihuahua, Mexico - ex: James F. Carryer Collection. Thanks to the Shadyside Mining Company's table at the 2003 Carnegie Gem & Mineral Show for the specimen! |
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| Row 26 |
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 Siderite
A spectacular miniature of shimmery light-green siderite plates from the Panasqueira Mine, level 3 (2003), Beira Baixa Province, Castelo Branco District, Portugal. Thanks to Gregor Buehler's auction on eBay for the specimen and the image! | |
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 Siderite
This beautiful miniature of green siderite, quartz, and marcasite is deaccessioned from the collection of Neil Prenn - it dates back to the 70s and is from the Morro Velho Mine in Nova Lima, Minas Gerais, Brazil. The larger image (bottom row, right) shows some millimeter-sized pyrrhotite crystals. Thanks to C. Jones' (Geoprime Minerals) auction on eBay for the specimen and the image! | |
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 Siderite
An excellent miniature of tiny green siderite crystals on matrix from the Mure Mine, Isère, Rhône-Alpes, France. Thanks to Sue Silver's auction on eBay for the specimen! |
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| Row 27 |
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 Siderite
on Quartz
A cute Russian miniature of tan siderite crystals covering a single twinned quartz crystal. Thanks to Barbara Babel's auction on eBay for the specimen and the images! |
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 Siderite, var.
Manganosiderite
Manganese can replace some of the iron in siderite - this miniature of deep brown manganoan siderite crystals in matrix is from Mont St. Hilaire, Québec, Canada. Ex: Croad Collection 1971. Thanks to C. Carter Rich's table at the 2003 Carnegie Gem & Mineral Show for the specimen! |
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 Siderite, var.
Manganosiderite
A sharp lustrous manganosiderite crystal thumbnail, also from Mont St. Hilaire. Thanks to Graeber & Himes' table at the 2004 Carnegie Gem & Mineral Show for the specimen! |
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| Row 28 |
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 Siderite, var.
Sphaerosiderite
When siderite occurs in a sphericular habit it's called sphaerosiderite (sphärosiderite) - this miniature's from Estacada, Clackamas County, Oregon. Thanks to Toby Page's auction on eBay for the specimen! |
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 Sidorenkite
A bright pink crystal of sidorenkite (a sodium manganese phosphatocarbonate) in matrix from the type locality of Mount Alluaiv, Lovozero, Kola Peninsula, Russia. Thanks to Tom & Vicki Loomis at Dakota Matrix Minerals for the specimen and the images! | |
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 Sphaerocobaltite
& Heterogenite
A micro of sphaerocobaltite (cobalt carbonate, IMA spelling spherocobaltite) and heterogenite (cobalt oxyhydroxide) from Mount Cobalt, Selwyn Ranch, Queensland, Australia. These may well be true sphaerocobaltite and heterogenite - most of what's on the market is either cobaltoan dolomite from the Congo or more recently (2003) cobaltoan calcite from Morocco; likewise, most Congo-associated heterogenite is oxidized chrysocolla. Thanks to Chris Auer's (Eureka Micromounts) auction on eBay for the specimen and the image! |
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| Row 29 |
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 Sphaerocobaltite
This micromount of deep magenta sphaerocobaltite rosettes on pale pink (cobaltian) dolomite is from the Aghbar cobalt / nickel mine, Bou Azzer, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco. Thanks to Colleen Thomson's Thomson Minerals auction on eBay for the specimen and the image! |
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 Stichtite
This fairly rare stichtite on serpentine large thumbnail comes from (maybe the type locality of Stichtite Hill), Dundas, Tasmania. It's a magnesium-chromium hydroxycarbonate - the chromium gives it the purple color. It's named after Robert Sticht, general manager of the Mt. Lyell Mining & Railway Company in Tasmania. It's dimorphic with Barbertonite. Thanks to Greg Meyers' (Greg's Minerals) auction on eBay for the specimen! | | |
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 Strontianite
A beautiful miniature of tufted strontianite, strontium carbonate, (some of it yellow) and a few calcite crystals on a drusy matrix from the Old Faylor Quarry, now part of the Faylor-Middle Creek Quarry in Winfield, Union County, Pennsylvania, a classic locale for white-phosphorescing strontianite. Thanks to Dennis Gross' auction on eBay for the specimen and the image! | |
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| Row 30 |
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 Strontianite,
var. Emmonite
An old (pre-1900) miniature of tiny colorless calcian strontianite (emmonite) needles from the type locality for this variety, Brixlegg, Tyrol, Austria. Ex: Volkwein Collection - (#E2-11) and with a K. S. Mineralien - Niederlage zu Freiberg .80 tag (larger image, bottom right). Thanks to Dieter Obrecht's The NetMine auction on eBay for the specimen and the images! | |
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 Synchysite-(Ce)
Synchysite's a rare cerium calcium fluorocarbonate - this thumbnail of tiny dark brown synchysite crystals on matrix is from the Demix Quarry, Mont St. Hilaire, Québec, Canada. It's the endmember of a three-member series with synchysite-(La) and synchysite-(Y) where lanthanum and yttrium (respectively) replace the cerium. Thanks to Val Collins' auction on eBay for the specimen and the image! |
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 Synchysite-(Y)
Synchysite-(Y) is the yttrium-rich endmember of the series - this miniature (possibly from the type locality of the Scrub Oak Mine (Replogle Mine), Mine Hill Borough, Morris County, New Jersey) comprises brick-red masses of synchysite (larger image, upper right) in a magnetite matrix with unidentified blue-fluorescing (LUV) colorless radial sprays (larger image, lower left). Thanks to Tony Nikischer's (Excalibur Mineral Company) auction on eBay for the specimen and the image! | |
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| Row 31 |
|---|
 Takovite
This thumbnail of massive takovite, a hydrated nickel aluminum hydroxycarbonate, comes from the find in Spring 2001 in Laurion, Attiki, Greece. Thanks to Chris Auer's (Eureka Micromounts) auction on eBay for the specimen! |
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 Tengerite-(Y)
Tiny, flat, white crystals of tengerite-(Y) (hydrated yttrium carbonate) crystals on matrix comprise this miniature from the abandoned Evans-Lou Mine feldspar quarry north of Ottawa, Quebec, Canada. Note that tengerite from here may not be tengerite - at least five different minerals have been identified as such over the years. Thanks to Kristen Burgess' auction on eBay for the specimen! |
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 Teschemacherite
and Salammoniac
A large micro of white, microcrystalline teschemacherite (ammonium bicarbonate) and salammoniac (ammonium chloride) on matrix from the guano mine at Pabellón de Pica, Chanabaya, Iquique Province, Tarapacá Region, Chile. It has Mineral Zone and Gunnar Farber Mineralien tags. Despite this specimen's provenance, note that MinDat shows no Chilean teschemacherite deposits. Thanks to David H. Garske's auction on eBay for the specimen and the image! |
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| Row 32 |
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 Thermonatrite
A gathering of white thermonatrite (sodium carbonate monohydrate) particles from Kern County, California. Thanks to Kristen Burgess' auction on eBay for the specimen! |
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 Thomasclarkite-(Y)
A couple of tiny but highly visible light-yellow thomasclarkite (a complex rare-earth element hydrated hydroxycarbonate) cubes on a micromount matrix from the type locality of the Poudrette Quarry, Mont St. Hilaire, Québec, Canada. Thanks to Arnaldo Brunetti's auction on eBay for the specimen! | |
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 Tunisite
Small transparent tunisite (an aluminum calcium sodium chlorohydroxycarbonate) crystals fill a cavity in this miniature from Condorcet, Nyons, Drome, France. Tunisite is only available from three locations. Thanks to Csanad Loranth's auction on eBay for the specimen and the images! |
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| Row 33 |
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 Tychite
A single white octahedral crystal of tychite (a sodium magnesium sulfatocarbonate) from Searles Lake, San Bernardino County, California. It forms a complete series with ferrotychite (where ferrous iron replaces the magnesium) and is also the magnesium analog of manganotychite, but apparently not even a partial series exists. Tychite is also isostructural with northupite. Thanks to Jonathan Green's auction on eBay for the specimen! |
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 Wegscheiderite
Sub-millimeter particles of wegscheiderite (a sodium bicarbonate-carbonate) from Grierson Well No. 1, Green River Formation, Sweetwater County, Wyoming. Thanks to Paolo Bracci's auction on eBay for the specimen and the image! |
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 Weloganite
The Francon Quarry in Montréal, Québec, Canada is essentially the only location (and the type locality) for good crystals of weloganite, a rare strontium sodium titanium carbonate. The Francon Quarry is now owned by the city of Montréal, in a residential area, and is used as a snow dump in winter. Thanks to Darrel Merke's auction on eBay for the specimen! | |
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| Row 34 |
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 Weloganite
This micro of weloganite crystals on matrix is also from the Francon Quarry. Thanks to Chris Stefano's auction on eBay for the specimen and the close-up image! |
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 Widgiemoolthalite
on Gaspeite
A representative micro of green widgiemoolthalite (a hydrated nickel hydroxycarbonate) on pale yellow-green gaspeite from the type and only locality of the now-closed open-pit nickel mine, 132 North Mine (Mount Edwards), Widgiemooltha, Coolgardie Shire, Western Australia, Australia. Ex: Steve Sorrell Collection. Thanks to Steve Sorrell's auction on eBay for the specimen and the images! | |
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 Witherite
This miniature from the Minerva #1 Mine, Hardin County, Illinois consists of massive witherite (barium carbonate) with a pocket of witherite crystals (larger image, right). Thanks to Charles Creekmur's auction on eBay for the specimen! |
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| Row 35 |
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 Zaratite with
Chromite
Zaratite is a hydrated nickel hydroxycarbonate and is named after the Spanish explorer Zarate. This specimen of green zaratite veins in black chromite and a few millimeter-size magnetites comes from the Clear Creek area, San Benito County, California. Thanks to Greg Meyers' (Greg's Minerals) auction on eBay for the specimen! | |
 Zaratite
An excellent miniature of zaratite with dolomite from the classic locale of the Wood's Chrome Mine near Texas, Little Britain Township, Lancaster County, Pennsylvania. Ex: Bertolet Collection. Thanks to Tom Klinepeter's auction on eBay for the specimen! | |
 Zaratite
Another miniature of zaratite on weathered serpentine from the long-abandoned Lord Brassey Mine, Heazlewood District, Tasmania, Australia. Because of its often variable composition, some references do not consider zaratite a true mineral. Thanks to David H. Garske's auction on eBay for the specimen and the image! |
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