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Mineral Specimens with Calcite
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4.5 x 3.4 x 2.3 cm. A bizarre and not so ugly pseudomorph for a brown on white mineral specimen. A sharp, disc-shaped, 3.5-cm calcite has here been completely replaced by goethite, which preserved the original form perfectly. Aesthetic. Ex. Charlie Key.
9.5 x 7.1 x 3.6 cm. A large, attractive, sculptural specimen of manganoan calcite (probably on kutnohorite, beneath the larger crystal aggregates). Very interesting, curvaceous form. Ex. Charlie Key.
6.3 x 3.8 x 3.3 cm. An attractive and unusual combination piece with shimmering, hot pink cobalt-rich minerals of several species and sizes: the larger, hot pink, rhombohedral dolomites; and the smaller druse of cobaltoan calcite on which the big rhombs sit. Finding the two carbonates together on one piece, and both pink, is a big surprise to me. Ex. Charlie Key.
6.1 x 5.0 x 3.0 cm. A beautiful, robust pink colored specimen of solid manganoan calcite, which fluoresces a lovely orange under ultraviolet light by the way. This is a really attractively formed specimen of this calcite varietal which is common for this mine…was common, once, anyhow. Ex. Charlie Key.
7.0 x 3.1 x 2.6 cm. A unique piece with sparkling, gemmy, jewel-like gem ettringite crystals sprinkled upon a cluster of unusually elongated spear-like calcite crystals. The calcite is also unusually high in lustre, so the two complement in lustre and contrast in color. Ex. Charlie Key.
7.5 x 6.1 x 3.6 cm. A striking calcite specimen with unusually good gemminess, transparency, and sharp crystal faces. Rare from the Wessels in such quality. The two large crystals are 3 cm. Ex. Charlie Key.
13.0 x 7.6 x 4.2 cm. A superb, cabinet-sized calcite specimen from the Sweetwater Mine and George Feist Collection. This doubly-terminated, 11.6 cm, gemmy, amber calcite scalenohedron is set on sulfide matrix covered with galena, dolomite and chalcopyrite. The glassy, 3-sided prism has outstanding, stepped-growth faces. The termination is very gemmy and the piece is very nearly pristine. Ex. George Feist Collection.
7.2 x 6.4 x 6.0 cm. Rare, lustrous, caramel-colored, bi-pyramidal wulfenite crystals to 8 mm are festooned on the sturdy, 3-dimensional, 5-sided, very vuggy matrix of sulfides and iron oxides from the much less well-known Cuchillo Parado area of Chihuahua, Mexico. A rich scattering of lustrous, colorless calcite crystals are a very nice accent. Older material, seldom available. Ex. Consie Prince Collection.
9.9 x 7.8 x 4.1 cm. Three quartz crystals draped with a blanket of sparkly, light cream-colored calcite - with a second generation of calcite growth of an entirely different form, an extremely complex translucent compound crystal with pyramidal sub-terminations all over it. You can see a few chalcopyrite crystals as well. A beautiful classic piece from 20 years ago. Ex. Jaime Bird Collection.
4.4 x 2.6 x 2.4 cm. A classic association from Naica, but in an unusual form. Here you have a large, glossy compound crystal of sphalerite, with unusual rounded galenas and blocky rhombs of cream-colored calcite. Ex. Jaime Bird Collection.
14.8 x 11.8 x 7.4 cm. This Chinese find a few years back is really unique: bright golden pyrite decorating the edges of large, densely-intergrown crystals of calcite. No more of this material around - it had all been sold off by last year.
4.4 x 2.8 x 2.2 cm. A dioptase crystal measuring just over one centimeter is beautifully isolated on a cluster of milky calcite rhombohedrons, from the Tsumeb Mine.
9.7 x 9.4 x 5.2 cm. If you pick up any old mineralogy book from the so-called Golden Age of mineralogy, and look at the classics shown from Europe as scientists were describing and learning about symmetry and classification, you will see these dramatic calcites again and again, illustrated as far back as the 1700s. St. Andreasberg is a major silver-mining district that dates back further still. From the dawn of serious mineral collecting in Europe, these calcites were desired and traded amongst the collecting nobility and scientific elite of the day. Today, especially large and showy specimens are seldom seen and hard to obtain. This specimen has the dramatic columnar crystals with slight white color-zoning, which I think you can safely say is the classic style for the locale, most known. Crystals reach 2 cm in size and spray dramatically from a common center.
5.4 x 5.4 x 3.2 cm. Beautiful, white, stacked Calcite rhombs have formed into columnar or stalactitic formations which are associated with minor green Duftite and a bit of matrix. A less common form for Calcite from Tsumeb. Ex. Rob Smith Collection.
6.0 x 3.5 x 3.3 cm. Michigan copper in calcite specimens are certainly one of the most desirable calcite varietals in the world. Most of them were produced prior to World War I. Bright copper within glassy, striated calcite scalenohedrons and rhombs presents a unique and very beautiful calcite specimen. This classic and aesthetic, old-timer features two, glassy, highly lustrous and striated, richly filled, copper in calcite crystals beautifully perched atop matrix, which includes copper leaves and stringers of epidote. The gorgeous, nearly doubly terminated crystal is 3.5 cm and the large, blocky rhomb is 3.8 cm. The scalenohedron is pristine and the large crystal is very minimally impacted by the contacting and cleaving at the end. This is an excellent, old-time representation of this very desirable calcite variety and is accompanied by an older Larry Conklin label.
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Rob Lavinsky, rob@irocks.com
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share specimen![Goethite, Calcite, Feldspar Group from Erongo Mountain, Usakos and Omaruru Districts, Erongo Region, Namibia [db_pics/mdpics/MD-215498a.jpg]](db_pics/mdpics/MD-215498a.jpg)
![Calcite (Var: Manganoan Calcite) from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-215499a.jpg]](db_pics/mdpics/MD-215499a.jpg)
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![Calcite (Var: Manganoan Calcite) from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-215562a.jpg]](db_pics/mdpics/MD-215562a.jpg)
![Ettringite, Calcite from N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-215564a.jpg]](db_pics/mdpics/MD-215564a.jpg)
![Calcite from Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-215575a.jpg]](db_pics/mdpics/MD-215575a.jpg)
![Calcite from Sweetwater Mine (Milliken Mine; Frank R. Milliken; Blair Creek; Ozark Lead Company Mine; Adair Creek; Logan Creek), Ellington, Viburnum Trend District, Reynolds Co., Missouri, USA [db_pics/mdpics/MD-216051a.jpg]](db_pics/mdpics/MD-216051a.jpg)
![Wulfenite, Calcite from Aurora Mine, Cuchillo Parado, Mun. de Coyame, Chihuahua, Mexico [db_pics/mdpics/MD-216402a.jpg]](db_pics/mdpics/MD-216402a.jpg)
![Wulfenite, Calcite from Aurora Mine, Cuchillo Parado, Mun. de Coyame, Chihuahua, Mexico [db_pics/mdpics/MD-216402b.jpg]](db_pics/mdpics/MD-216402b.jpg)
![Calcite, Quartz from Boldut Mine, Cavnic (Kapnic; Kapnik), Maramures Co., Romania [db_pics/mdpics/MD-216437a.jpg]](db_pics/mdpics/MD-216437a.jpg)
![Calcite, Quartz from Boldut Mine, Cavnic (Kapnic; Kapnik), Maramures Co., Romania [db_pics/mdpics/MD-216437b.jpg]](db_pics/mdpics/MD-216437b.jpg)
![Sphalerite, Galena, Calcite from Naica, Mun. de Saucillo, Chihuahua, Mexico [db_pics/mdpics/MD-216506a.jpg]](db_pics/mdpics/MD-216506a.jpg)
![Pyrite, Calcite from Chenzhong (?), Hunan Province, China [db_pics/mdpics/MD-216533a.jpg]](db_pics/mdpics/MD-216533a.jpg)
![Dioptase, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-216538a.jpg]](db_pics/mdpics/MD-216538a.jpg)
![Dioptase, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-216538b.jpg]](db_pics/mdpics/MD-216538b.jpg)
![Calcite from St Andreasberg, St Andreasberg District, Harz Mts, Lower Saxony, Germany [db_pics/mdpics/MD-216622a.jpg]](db_pics/mdpics/MD-216622a.jpg)
![Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-216708a.jpg]](db_pics/mdpics/MD-216708a.jpg)
![Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-216708b.jpg]](db_pics/mdpics/MD-216708b.jpg)
![Copper, Calcite from Quincy Mine, Hancock, Houghton Co., Michigan, USA [db_pics/mdpics/MD-217400a.jpg]](db_pics/mdpics/MD-217400a.jpg)