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Mineral Specimens with Calcite
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A beautiful crust of light-pink cobaltian dolomite partially covered on one side and fully covered on the other with highly lustrous, translucent amber nailhead calcite crystals to 1.6 cm from Tsumeb. Scattered bruising to a few of the calcite crystals, mostly on the periphery, certainly does not detract from the quality of this piece. 6.5 x 5.7 x 2.2 cm
A showy cluster of frosted-white, translucent and colorless modified calcite scalenohedrons to 3.0 cm from the famous Idarado Mine of Colorado. Classic material! 6.8 x 6.2 x 4.2 cm
23.0 x 18.1 x 8.8 cm. This is a rather large calcite for this late-1800's-era locality. The piece is outstanding and is really elegantly colored by the slight hematite inclusions. The calcites sit on and radiate from a convex bubble of hematite (kidney ore) underneath. Ex. Andrew Carnegie Collection.
6 x 5.2 x 4.5 cm. This lovely twin has excellent luster and very good clarity. When you hold it in your hand, you will know why the Egremont heart-twins are some of the most desired Calcites in the world. This one is particularly robust and heart-shaped, so it fits that mold wonderfully. Classic late 1800s-era material. Ex. Martin Lewadny Collection.
6.7 x 2.5 x 1.8 cm. This is an elegant cluster of floating calcites with incredibly glassy lustre, from the mid-to-late 1800s mining at Egremont. It is complete-all-around and has very sculptural aesthetics. Ex. Rob Lavinsky and Wally Mann Collections.
4.5 x 4 x 3 cm. This 3.2 x 2.5 x 1.5 cm twinned calcite is perched squarely on needle-like crystals of calcite. It has a slight color to it caused by Hematite staining, and in person is slightly more colorful than shown. Ex. Metzger Collection (early-mid 1900's), though certainly the piece was mined before then.
6.2 x 5.2 x 3.1 cm. A 3-dimensional and highly unusual group of large calcites from Cornwall. Surprisingly at first, calcite is quite rare from Cornwall, at least in surviving specimens. This is attractive and nearly pristine. Ex. Tim Sherbern and Bally Museum Collections.
7.0 x 6.1 x 3.9 cm. The piece features a stunning electric green-yellow apatite crystal the color of a good brazilianite, measuring 2.25 inches tall and with glassy lustre. Matrix apatites from here are really rare and generally older material from the 1960s-70s era of mining here. Ex. Irv Brown Collection.
10 x 8 x 4 cm. An incredible, beautiful combination specimen featuring two large ettringite crystals of lemon yellow hue perched on sparkling and contrasting crystallized white calcite and gaudefroyite, further accented by a hematite crystal atop. The hematite is striking, and is 2.25 cm long and doubly terminated, scalenohedral in form. The ettringite crystals are to 4.5 cm in length and shimmer with electric sheen on the surface, and have deep color that does not convey well in the photo. This is a very rare, large example of the species in super aesthetic form. It was found in the mid to late 1980s. Ex. Charlie Key.
9.2 x 7.1 x 3.0 cm. A unique, old-time calcite specimen from the Joplin Field of Missouri. This weirdly shaped, conical piece is called a "harlequin" or masked calcite. A glassy, translucent, amber calcite scalenohedron has an overgrowth crust of bone-white aragonite. The aragonite masks the calcite, just as a Harlequin, a comic character in pantomine, wears a mask. A very unusual specimen from a very uncommon mine - the Blue Goose, in this historic district. Ex. Norris, Steve Chamberlain and George Feist Collections.
9.4 x 8.4 x 5.0 cm. This find was made a couple of years back in China, and is absolutely unique: glittery, golden pyrite microcrystals on the edges of huge (to 5.3 cm across on this piece) flattened rhombs of pastel-pink manganoan calcite. Some of the specimens had very sparse coverage of pyrite, just a salting, but here, it is richly carpeting the crystal edges. Excellent orange fluorescence.
8.9 x 4.5 x 3.9 cm. An aesthetic 2.5 cm wide, lustrous, royal-blue cavansite ball with two prominent cavansite blades aesthetically set on basalt matrix covered with tiny, lustrous stilbite blades from the Wagholi Quarry of India. Attractive, tiny, amber calcite rhombs are scattered on the cavansite ball for a nice accent. This is a superb small cabinet for its own aesthetics and for the crystalography shown: Bladed cavansite of this variety is far less-common, than the cavansite balls. The combination of the blades in the ball is quite uncommon. These are also, large blades.
3.7 x 3.0 x 2.6 cm. Plancheite is a rare secondary, hydrated, copper silicate. A fine vug on gossan matrix has powder-blue plancheite covered by and highlighted by a multitude of thin, water-clear barite blades and further accented by plancheite-included calcite crystals and a couple of quartz crystals. For the locale, this is a very highly representative combination specimen featuring this rare copper silicate.
Gorgeous, light-pink platy crystals piled atop one another, with a beautiful overall form. The specimen is really lustrous, and has a fine overall form. 8.8 x 6 x 4 cm
8.5 x 7.5 x 6.1 cm. Bright, canary-yellow crusts of the hydrated calcium uranyl vanadate tyuyamunite richly cover all four sides of the blocky limestone matrix on this fine specimen from the Ambrosia Lake area, Grants District, New Mexico. A sparkly overgrowth of secondary calcite microcrystals covers some of the specimen. Older material from the Mullane Collection.
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Rob Lavinsky, rob@irocks.com
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share specimen![Calcite, Dolomite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-23857a.jpg]](db_pics/mdpics/MD-23857a.jpg)
![Calcite from Idarado Mine, Telluride, Ouray District (Uncompahgre District), San Miguel Co., Colorado, USA [db_pics/mdpics/MD-23860a.jpg]](db_pics/mdpics/MD-23860a.jpg)
![Calcite, Hematite from Stank Mine, Barrow, South Western Region (Furness), Cumbria, England, UK [db_pics/mdpics/MD-238738a.jpg]](db_pics/mdpics/MD-238738a.jpg)
![Calcite from Egremont, West Cumberland Iron Field, North and Western Region (Cumberland), Cumbria, England, UK [db_pics/mdpics/MD-238739a.jpg]](db_pics/mdpics/MD-238739a.jpg)
![Calcite from Bigrigg Mine, Bigrigg, West Cumberland Iron Field, North and Western Region (Cumberland), Cumbria, England, UK [db_pics/mdpics/MD-238740a.jpg]](db_pics/mdpics/MD-238740a.jpg)
![Calcite from Egremont, West Cumberland Iron Field, North and Western Region (Cumberland), Cumbria, England, UK [db_pics/mdpics/MD-238741a.jpg]](db_pics/mdpics/MD-238741a.jpg)
![Calcite from Egremont, West Cumberland Iron Field, North and Western Region (Cumberland), Cumbria, England, UK [db_pics/mdpics/MD-238741b.jpg]](db_pics/mdpics/MD-238741b.jpg)
![Calcite from Wheal Wrey, St Ive, Menheniot Area, Liskeard District, Cornwall, England, UK [db_pics/mdpics/MD-238743a.jpg]](db_pics/mdpics/MD-238743a.jpg)
![Apatite-(CaF), Calcite from Cerro de Mercado Mine, Victoria de Durango, Cerro de los Remedios, Mun. de Durango, Durango, Mexico [db_pics/mdpics/MD-238744a.jpg]](db_pics/mdpics/MD-238744a.jpg)
![Ettringite, Hematite, Gaudefroyite, Calcite from N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-238790a.jpg]](db_pics/mdpics/MD-238790a.jpg)
![Calcite, Aragonite from Blue Goose Mine, Joplin Field, Tri-State District, Jasper Co., Missouri, USA [db_pics/mdpics/MD-238838a.jpg]](db_pics/mdpics/MD-238838a.jpg)
![Pyrite, Calcite (Var: Manganoan Calcite) from Chenzhong (?), Hunan Province, China [db_pics/mdpics/MD-238841a.jpg]](db_pics/mdpics/MD-238841a.jpg)
![Pyrite, Calcite (Var: Manganoan Calcite) from Chenzhong (?), Hunan Province, China [db_pics/mdpics/MD-238841b.jpg]](db_pics/mdpics/MD-238841b.jpg)
![Cavansite, Calcite, Stilbite-Ca from Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra, India [db_pics/mdpics/MD-238884a.jpg]](db_pics/mdpics/MD-238884a.jpg)
![Cavansite, Calcite, Stilbite-Ca from Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra, India [db_pics/mdpics/MD-238884b.jpg]](db_pics/mdpics/MD-238884b.jpg)
![Plancheite, Baryte, Calcite, Quartz from Shangulowé Mine, Kambove, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) [db_pics/mdpics/MD-238895a.jpg]](db_pics/mdpics/MD-238895a.jpg)
![Calcite (Var: Manganoan Calcite) from 2nd Sovietskii Mine (2nd Sovietskiy Mine), Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tetjuche), Primorskiy Kray, Far-Eastern Region, Russia [db_pics/mdpics/MD-23892a.jpg]](db_pics/mdpics/MD-23892a.jpg)
![Tyuyamunite, Calcite from Ambrosia Lake area, Grants District, McKinley Co., New Mexico, USA [db_pics/mdpics/MD-238951a.jpg]](db_pics/mdpics/MD-238951a.jpg)