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Mineral Specimens with Sphalerite
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7.3 x 5.9 x 2.1 cm. A fine combination plate with very gemmy, golden-yellow sphalerite crystals, brassy chalcopyrite crystals and a rich scattering of fortification to hoppered galena crystals from the small find a few years ago at the Commodore Mine at Creede, Colorado. Many of the highly lustrous, black-looking sphalerite crystals are, in fact, partially gemmy. The largest gemmy sphalerite crystal is 1.3 cm. These caused a major stir at the Tucson Show, when they came out. Ex. George Fisher and Mijer Collections.
10.4 x 8.4 x 5.3 cm. A very aesthetic sphalerite specimen from the Elmwood Mine. A large, 6.5 cm wide, corsage-like ball of splendent, ruby-jack sphalerite crystals is beautifully perched on a sliver of silicified limestone covered with pearlescent dolomite rhombs. The tiny purple fluorites scattered about the dolomite are a fine accent. Ex. Mullane Collection and accompanied by a 1970s-era Roberts Minerals label.
5.5 x 3.8 x 2.6 cm. From the find from about 7 years ago, this is a piece from the find at the Estano Orcko mine. This specimen features a few good-sized, relatively sharp, dark, lustrous, modified dodecahedra of Sphalerite associated with minor Pyrite on the back. The Sphalerite has a very slight unusual "peacock blue-green" patina which is actually a Bornite "wash" that is seen on practically every specimen from this find.
9.5 x 8.1 x 5.5 cm. A very fine and aesthetic fluorite on sphalerite specimen from the Elmwood Mine. A large, 5.7 x 5.3 cm cube has gemmy, colorless to white interior and classic, outer purple zones. The cube faces are lustrous and have the typical, stepped-growth faces. The corners are starting to get gemmy, another hallmark of Elmwood fluorites. The fluorite is very nearly pristine. Ex. Consie Prince Collection.
8.2 x 6.5 x 6.0 cm. A 3.4 cm, highly lustrous, twinned, stepped-growth face, jet-black sphalerite crystal crowns this fine sphalerite and galena specimen from recent finds at the Santa Eulalia District of Mexico. Part of the "melted look" galena crystal looks like a "feather" on top of the large sphalerite crystal. The rest of the unusual galena crystal is revealed on the back side of the piece. Bands of tiny calcite crystals are a nice accent on this fine combination specimen.
7.8 x 7.4 x 4.8 cm. A striking sphalerite on quartz specimen from the historic Schemnitz mining district of Slovakia. A lustrous, 2.8 cm, twinned, jet-black sphalerite crystal with brown accents is very aesthetically set amongst sharp "mountain peaks" of glassy quartz crystals of very unusual habit. The terminations of the quartz crystals have a strange, secondary overgrowth of water-clear quartz with the sides of the faces having distinctive skeletal features. The quartz crystal terminations have a distinct, five-sided, star pattern, if you look straight down onto the quartz crystals.
9.2 x 6.9 x 4.1 cm. A fine, 3-dimensional specimen from the famous, but less well-known Deardorff Mine of the Illinois Fluorspar District. Well-placed and isolated sphalerite and fluorite crystals are set like jewels on the coral-like, drusy quartz matrix. The 1.3 cm, fuchsia, fluorite cube and 1.7 cm lustrous, twinned, jet-black sphalerite are stunning in their crestal locations. Smaller sphalerite and fluorite "jewels" are nestled in the drusy quartz framework. This is classic, old-time material from this mine dating from the 1930s to 1950s, as the mine closed in the early 1960s. The Deardorff was considered to be the specimen mine of this period in Southern Illinois.
10.0 x 7.6 x 5.3 cm. A fine, old-time, cabinet-sized sphalerite specimen from one of the famous mines at Creede, Colorado. Gemmy and lustrous, twinned, golden-amber sphalerite crystals to 1.8 cm richly and attractively cover both sides of the sulfide matrix. The more isolated and smaller crystals on the backside are particularly gemmy. A single, 1.2 cm, lustrous, steel-gray, fortification galena cube on the front side is a very nice accent. This is classic for the locality. A very interesting feature is the cavity on the side that holds a 1.2 cm, totally loose sphalerite crystal. Excellent, old material from this historic district from the John Ydren Collection.
21.9 x 10.4 x 6.3 cm. A fine, elongated, large cabinet, Elmwood specimen from the 1970s. This very 3-dimensional, complete-all-around piece is a near floater, with only a few minor points of attachment. The crowning glory of this scepter-like specimen is the perfect, 1.7 cm, purple fluorite cube with the attendant spray of cream-colored baryte. Gemmy, sparkly, ruby-jack sphalerite crystals are festooned on all sides lustrous, dolomite rhomb matrix. Two additional, smaller fluorite cubes are hidden in crevices on this striking, large piece. This is classic, old-time material from this famous and now-closed mine. Ex. Saller Collection, Germany.
10 x 6.4 x 3.7 cm. An excellent cluster of highly lustrous Sphalerite with classic ruby-jack (red flashes) highlights from the Elmwood Mine. Many of the crystals exceed 1 cm in size. The uniformity and brilliant luster, deep color, and overall crystal quality make this highly aesthetic. Ex. Charlie Key stock.
3.0 x 2.2 x 1.6 cm. A fine, sharp, pale golden pyritohedral crystal group of Pyrite sits atop a crystallized matrix of black tetrahedral Sphalerite. The largest Pyrite crystal measures 1.2 cm across.
9.3 x 6.6 x 2.5 cm. The various ore bodies in southern Bulgaria have produced a lot of memorable sulfide and carbonate specimens, and even though the Rhodochrosite from this area is not world-class, it is the only locality that I know of where Rhodochrosite occurs with stilbite. This piece would be a good association specimen without the Stilbite crystals, but the color combination of pink Rhodochrosite, with white Stiblite, golden Chalcopyrite and underlain brownish Sphalerite makes this a very attractive and unusual piece. The Stilbite crystals are admittedly small, but the fact that they are sitting atop Rhodochrosite makes it all the more enticing. Ex. Brian Kosnar Collection.
5.5 x 5.0 x 2.7 cm. Lightly iridescent and lustrous bournonite cogwheels are aesthetically and richly piled up on the sculptural and mounded quartz-rich matrix on this fine and uncommon combination specimen from the Boldut Mine of Romania. Sphalerite and pyrite crystals are a nice compliment to this fine specimen from the Michael Schmidt and Tarnowski Collections.
7.5 x 6.3 x 4.4 cm. A highly unusual and very fine pair of intergrown, spherical calcite crystals nicely accented with gemmy, ruby-jack sphalerite crystals. The frosted, translucent calcites have a rich, golden-honey color when backlit. This is old-time, pristine material from this historic district and is from the very much less well-known Leopard Mine of the Picher Field. A striking and strange calcite specimen from the George Feist Collection # 1440. It looks like a fossilized dinosaur egg.
7.9 x 5.9 x 5.6 cm. A fine, complete-all-around combination specimen from the venerable Trepca Complex in Kosovo. A dramatic, 3.0 cm, ball of intergown, colorless, translucent calcite rhombs aesthetically rests atop mounded matrix of lustrous, twinned, sphalerite crystals, which in turn, are richly covered with calcite rhombs and scalenohedrons. Classic material from this locale and nearly pristine, with only trivial edge-wear to the 2.0 cm sphalerite crystal. Ex. Steve Smale Collection.
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Rob Lavinsky, rob@irocks.com
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share specimen![Sphalerite, Chalcopyrite, Galena from Commodore Mine, Amethyst Vein, Creede District, Mineral Co., Colorado, USA [db_pics/mdpics/MD-237474a.jpg]](db_pics/mdpics/MD-237474a.jpg)
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![Sphalerite, Quartz from Banská Štiavnica (Selmecbánya; Schemnitz), Banská Štiavnica Mining District, Štiavnica Mts, Banská Bystrica Region, Slovakia [db_pics/mdpics/MD-238936b.jpg]](db_pics/mdpics/MD-238936b.jpg)
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![Calcite, Sphalerite from Trepča complex, Trepča valley, Kosovska Mitrovica, Kosovo [db_pics/mdpics/MD-243399b.jpg]](db_pics/mdpics/MD-243399b.jpg)