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Mineral Specimens with Calcite
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13.8 x 7.4 x 6.2 cm. A fine Indian cabinet combination specimen from recent finds at Jalgaon. This striking piece is dominated by a large, 6.0 x 6.0 cm, gem-like, golden-amber calcite rhomb. The rhomb is beautifully perched on a column of pearlescent stilbite blades accented with a few green apophyllite crystals. The lower part of the calcite rhomb is transparent. The color is a very rich hue, not pale as usual for this material.
5.6 x 5.3 x 4.7 cm. This is a very rare specimen. These were found in the early 1980s, and the specimen consists of small calcite crystals on dioptase that were completely replaced by the copper mineral plancheite and turned a rich blue in color. This is only at one end of the piece. At the other end, the calcites have been replaced by chrysocolla, I think; or at least so heavily coated one cannot tell and it’s a moot point visually. Ex. Ed Swoboda Pseudomorph Collection (see MinRec Nov/Dec 1997). He sold it to Carter Rich in 1999, who sold this to George Loud right after.
6.9 x 5.3 x 4.5 cm. This is really quite a superb combination piece, featuring a perfect 4 cm doubly-terminated green Apophyllite. Both tips are extraordinary and complete. The luster and the gemminess are excellent. There are also numerous light-pink Stilbite blades with gorgeous pearly luster – many are doubly-terminated themselves. These crystals primarily rest on two masses of very attractive drusy quartz, which themselves rest on the matrix. When you start looking at it closely, you realize that those "masses" of quartz are in fact flattened calcite rhombohedra, completely replaced by the quartz.
22.4 x 19.8 x 8.6 cm. This remarkable specimen features a 10 x 7 x 6 cm twinned calcite still in situ in a gently curving concave vug of superb, gemmy apophyllite. The calcite is pristine and the apophyllite as well, except only its periphery along the plate's edges. The piece really "sparkles" in light, which reflects off the apophyllites and into the calcite, illuminating it from seemingly more angles than you would expect. A 3-diminsional twin of this caliber, on matrix so nicely balanced, is not at all common.
8.8 x 6.4 x 6.3 cm. An aesthetic and classic Tri-State calcite specimen with two very complimentary generations of calcite from the George Feist Collection, # 2816. The sharp, lustrous, light amber calcite scalenohedrons, especially the striking large spire "protect" a gorgeous, 3.6 cm, translucent, golden-amber calcite rhomb. Very fine, old-time material from this historic locale.
9.3 x 7.2 x 4.5 cm. Transparent, glassy, color-zoned, honey-brown fluorite cubes to 1.7 cm and a rich sprinkling of colorless calcite rhombs cover the sculptural matrix on this fine upright specimen from a historic English mine and district - St. Peter’s Mine, Northumberland. This is a rare locality from which specimens are rarely available. Most are said to be from the 1800s. Superb purple fluorescence on this highly representative combination piece.
3.4 x 3.4 x 3.1 cm. Roncari Quarry babingtonite and prehnite specimens are among the most desirable and difficult to obtain in good specimens as combination mineral species from the Eastern United States. This outstanding miniature from the Ed David Collection features lustrous, black babingtonite crystals to 2.0 cm pleasingly complimented with translucent, sea-green prehnite balls on a matrix of colorless calcite rhombs. Classic combination material.
11.8 x 10.8 x 7.3 cm. A beautiful, classic, large calcite crystal on sphalerite with a bit of baryte from the Elmwood Mine. This gemmy and lustrous, amber crystal is actually doubly terminated on the lower left side. The primary termination is very sharp, gemmier and has more intense golden color. This termination is essentially pristine. Ex. Consie Prince Collection.
15.8 x 11.2 x 10.5 cm. A fine large cabinet calcite specimen from recent finds at Santa Eulalia, Mexico. Sharp, lustrous, and translucent, dogtooth calcite crystals are partially coated with hematite and have striking, clay-stained, internal, hematite phantoms. Crystals reach 4.0 cm on this piece.
2.5 x 2.5 x 1.4 cm. A superb thumbnail of a cluster of extremely gemmy and lustrous, emerald-green dioptase crystals to 1.1 cm aesthetically perched on a thin wedge of sparkly light sea-green smithsonite microcrysals and beautifully accented with a couple of colorless calcite rhombs. This very interesting Tsumeb combination specimen is from the Dr. Fred Pough Collection and is older material.
18.0 x 12.9 x 6.0 cm. An impressive, old-time, large cabinet calcite specimen from the famous iron mines at Frizington, England. The convex, sculptural crust is totally covered with glassy, colorless to hematite-tinted, modified calcite scalenohedrons to 1.7 cm. I like the way that one end of the piece is dominated by the tinted crystals. This end provides a stark contrast to the rest of the specimen. Certainly this piece is 100 years old or older. Ex. Dr. John Ward Collection and there is an old cloth label glued to the inside of the specimen.
4.5 x 2.9 x 1.6 cm. A classic and aesthetic Tsumeb specimen. Malachite pseudomorphs very sharp, bladed azurite crystals which are beautifully accented with a corsage of flattened, colorless calcite rhombs. Complete-all-around and pristine material from this famous and now-closed mine, this is an unusually fine and textbook-sharp miniature specimen.
12.5 x 9.5 x 5.0 cm. A fine, very sculptural cabinet calcite specimen from the Brushy Creek Mine of Missouri. This striking piece is dominated by a 7.3 cm, lustrous, translucent, doubly terminated and twinned calcite crystal. The very fine jumble of smaller calcite scalenohedrons is preferentially coated with sparkly, iridescent, multi-hued chalcopyrite microcrystals. These specimens have very interesting development: the original scalenohedrons were all covered with chalcopyrite, and then the calcite began growing again, enveloping the original crystal in some areas and leaving the chalcopyrite exposed in others. This is an impressive, large example of the classic combination species and well-known locality.
6.8 x 4.9 x 4.0 cm. The Grays Quarry is a limestone producer in far western Illinois (near the Missouri/Iowa border). Specimens are not common from this locality, and this is the first Calcite that I have had from Grays. It features a few soft pink color Calcite scalenohedra measuring up to 1.2 cm. sitting in a geode of colorless, gem Quartz. A great Midwest Calcite specimen from this uncommon locality. Ex. Richard Kosnar Collection.
Large, lustrous and translucent ISOLATED medium-brown poldervaartite crystals to 1.0 cm with sparkly, transparent calcite crystals on matrix from the 2001 find at the Wessels Mine. Isolated crystals are nearly unheard of! They almost always come as aggregates. Very choice material. 8.7 x 3.7 x 2.5 cm
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Rob Lavinsky, rob@irocks.com
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share specimen![Calcite, Stilbite-Ca, Apophyllite-(KF) from Jalgaon District, Maharashtra, India [db_pics/mdpics/MD-254006a.jpg]](db_pics/mdpics/MD-254006a.jpg)
![Plancheite, Chrysocolla, Calcite, Dioptase from Tantara Mine, Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) [db_pics/mdpics/MD-254261a.jpg]](db_pics/mdpics/MD-254261a.jpg)
![Plancheite, Chrysocolla, Calcite, Dioptase from Tantara Mine, Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) [db_pics/mdpics/MD-254261b.jpg]](db_pics/mdpics/MD-254261b.jpg)
![Plancheite, Chrysocolla, Calcite, Dioptase from Tantara Mine, Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) [db_pics/mdpics/MD-254261c.jpg]](db_pics/mdpics/MD-254261c.jpg)
![Apophyllite-(KF), Stilbite-Ca, Quartz, Calcite from Nasik District, Maharashtra, India [db_pics/mdpics/MD-254402a.jpg]](db_pics/mdpics/MD-254402a.jpg)
![Calcite, Apophyllite-(KF), Stilbite-Ca from Jalgaon District, Maharashtra, India [db_pics/mdpics/MD-254427a.jpg]](db_pics/mdpics/MD-254427a.jpg)
![Calcite from Joplin Field, Tri-State District, Jasper Co., Missouri, USA [db_pics/mdpics/MD-255033a.jpg]](db_pics/mdpics/MD-255033a.jpg)
![Fluorite, Calcite from St Peter's Mine, Sparty Lea, East Allendale, North Pennines, Northumberland, England, UK [db_pics/mdpics/MD-255054a.jpg]](db_pics/mdpics/MD-255054a.jpg)
![Fluorite, Calcite from St Peter's Mine, Sparty Lea, East Allendale, North Pennines, Northumberland, England, UK [db_pics/mdpics/MD-255054b.jpg]](db_pics/mdpics/MD-255054b.jpg)
![Babingtonite, Prehnite, Calcite from Roncari quarry (Tilcon quarry), East Granby, Hartford Co., Connecticut, USA [db_pics/mdpics/MD-255062a.jpg]](db_pics/mdpics/MD-255062a.jpg)
![Calcite, Baryte, Sphalerite from Elmwood mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, Smith Co., Tennessee, USA [db_pics/mdpics/MD-255154a.jpg]](db_pics/mdpics/MD-255154a.jpg)
![Calcite, Hematite from Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico [db_pics/mdpics/MD-255156a.jpg]](db_pics/mdpics/MD-255156a.jpg)
![Dioptase, Smithsonite, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-256823a.jpg]](db_pics/mdpics/MD-256823a.jpg)
![Calcite, Hematite from Frizington, West Cumberland Iron Field, North and Western Region (Cumberland), Cumbria, England, UK [db_pics/mdpics/MD-256824a.jpg]](db_pics/mdpics/MD-256824a.jpg)
![Malachite, Azurite, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-256917a.jpg]](db_pics/mdpics/MD-256917a.jpg)
![Calcite, Chalcopyrite from Brushy Creek Mine, Greeley, Viburnum Trend District, Reynolds Co., Missouri, USA [db_pics/mdpics/MD-257265a.jpg]](db_pics/mdpics/MD-257265a.jpg)
![Calcite, Quartz from Grays Quarry, Hamilton, Hancock Co., Illinois, USA [db_pics/mdpics/MD-257288a.jpg]](db_pics/mdpics/MD-257288a.jpg)
![Calcite, Quartz from Grays Quarry, Hamilton, Hancock Co., Illinois, USA [db_pics/mdpics/MD-257288b.jpg]](db_pics/mdpics/MD-257288b.jpg)
![Poldervaartite, Calcite from N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-25808a.jpg]](db_pics/mdpics/MD-25808a.jpg)