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Mineral Specimens with Calcite
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9.0 x 7.8 x 6.0 cm. The Idarado mine is most famous for its Manganoan Calcite specimens. This piece is a lovely group of modified, prismatic scalenohedral Manganoan Calcite crystals with a soft pink hue. From the Black Bear vein. Ex. Brian Kosnar Collection.
A sharp crystal over 1 cm thick, terminated on both ends. This is an unusuall good large calcite crystal for the locality, for the price - in my opinion, anyhow. These were mined in the late 1800s 6.4 x 4.9 x 2.1 cm
A VERY unusual association! Cavansite rarely occurs with calcite and even more rarely with the classic indian gem rhombs, such as this one. In person it is even more breathtaking because the cavansite looks like it is literally erupting and bubbling out of the core of the calcite (which itself is gemmier in person than in the pics) 7.5 x 5.5 x 5.5 cm
11.0 x 7.3 x 6.3 cm. The main crystal is 3.5 inches tall, 3-dimensional and fat, and highly lustrous. The matrix is a mix of copper and rock. Ex. Irv Brown Collection.
SHARP, EXCEPTIONALLY lustrous crystals to 1.5 cm, perched on actual crystallized calcite matrix! I cannot tell you how rare this is! Mostly, the wulfies are jumbled together and not isolated....but beyond that they tend to be on flat, uncrystallized matrix whereas this one is on calcite crystals (however minute they may be)! It is a stunning specimen, because of the stark color contrast. 7.6 x 6 x 2.7 cm
12.9 x 6.8 x 4.4 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 over 9 cm across) crystals of 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. The largest crystal on this excellent cabinet piece is 4.7 cm.
13.5 x 7.8 x 4.0 cm. A beautiful, butterfly-twin calcite crystal on a cabinet plate from the small, one-time find in the early 2000s from Ametista do Sul, Brazil. The 3.1 cm, gem-like, calcite crystal beautifully lies on 3-dimensional basalt matrix covered with light amber calcite rhombs and strikingly studded with sparkly, water-clear selenite needles and crystals to 2.7 cm. These have not been available since the find came out about 7 years ago.
32.0 x 17.5 x 9.0 cm. A gigantic, large cabinet fluorite plate from the Elmwood Mine. Two of the translucent, purple fluorite cubes reach 6.8 cm, which are aesthetically complimented and highlighted by the four clusters of bladed baryte and three calcite crystals. Backlighting highlights the translucency, edge zoning and beautiful, purple color saturation of the fluorites. Ex. Consie Prince Collection.
4.5 x 3.0 x 2.8 cm. Vivid, gemmy and lustrous, pink, cobaltoan calcite scalenohedrons richly and beautifully cover the 3-dimensional, mounded matrix on this fine specimen from recent finds at Bou Azzer, Morocco.
3.5 x 2.8 x 2.4 cm. A mounded calcite specimen from the Tsumeb Mine. This classic-style, two-sided piece features lustrous, translucent, colorless calcite rhombs that are preferentially coated with pastel-green duftite. Ex. Rob Smith Collection.
WOW! What a neat calcite specimen! This piece features directionaly oriented phantom lines along the major face edges. 10.8 x 9.2 x 4.7 cm
9.1 x 8.5 x 2.5 cm. A classic, old-time calcite specimen from the Harvard and George Elling Collections. This piece features a curved vug filled with lustrous, glassy, colorless, dogtooth calcite crystals. The matrix is heavily brecciated and is mainly sphalerite. Certainly around 100 years old, but no proof, except the old Harvard label.
A SHARP, SUPER-GEMMY, phantomed crystal from this remote locality! Cleaved and partially rehealed in back, sharp as hell in front. In fact, it is the sharpest large crystal I have seen from the locality. 11 x 8 x 4.6 cm
5.0 x 4.8 x 4.8 cm. A fine, 1.7 cm, cuboctahedral fluorite crystal perched atop coated, calcite rhomb matrix. The pastel-purple fluorite crystal has two, absolutely water-clear faces that give a distinct, TV-look into the crystal interior. The remaining faces are lightly frosted. Also present is a small, spinel-twinned fluorite crystal attached to the upper corner of the fluorite. The matrix is glassy, intergrown, colorless calcite rhombs with a secondary overgrowth of cream-colored calcite microcrystals. This is a very distinctive specimen from a small new pocket found at the mines of Naica, Mexico about mid-2008.
7.5 x 5.3 x 3.2 cm. A beautiful set of lustrous, deep-green malachite crystals nestled in a pocket of very fine cobaltoan calcite crystals. The blocky and sharp 1 cm malachites against the rich pink make a fine combination. Primary malachite, that has formed on its own chemical bonds and not without subverting and replacing a previous fine azurite crystal, is rare in this magnitude. This is a very robust primary malachite crystal with unusually developed termination. Ex. Charlie Key Collection.
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Rob Lavinsky, rob@irocks.com
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share specimen![Calcite (Var: Manganoan Calcite) from Idarado Mine, Telluride, Ouray District (Uncompahgre District), San Miguel Co., Colorado, USA [db_pics/mdpics/MD-228520a.jpg]](db_pics/mdpics/MD-228520a.jpg)
![Calcite from Egremont, West Cumberland Iron Field, North and Western Region (Cumberland), Cumbria, England, UK [db_pics/mdpics/MD-22902a.jpg]](db_pics/mdpics/MD-22902a.jpg)
![Cavansite, Calcite from Wagholi Quarry, Wagholi, Pune District (Poonah District), Maharashtra, India [db_pics/mdpics/MD-22907a.jpg]](db_pics/mdpics/MD-22907a.jpg)
![Calcite, Copper from Quincy Mine, Hancock, Houghton Co., Michigan, USA [db_pics/mdpics/MD-229542a.jpg]](db_pics/mdpics/MD-229542a.jpg)
![Wulfenite, Calcite from Erupción Mine (Ahumada Mine; Erupción-Ahumada Mine), Los Lamentos Mts (Sierra de Los Lamentos), Mun. de Ahumada, Chihuahua, Mexico [db_pics/mdpics/MD-22958a.jpg]](db_pics/mdpics/MD-22958a.jpg)
![Pyrite, Calcite (Var: Manganoan Calcite) from Chenzhong (?), Hunan Province, China [db_pics/mdpics/MD-229581a.jpg]](db_pics/mdpics/MD-229581a.jpg)
![Calcite, Gypsum (Var: Selenite) from Ametista do Sul, Alto Uruguai region, Rio Grande do Sul, South Region, Brazil [db_pics/mdpics/MD-229681a.jpg]](db_pics/mdpics/MD-229681a.jpg)
![Calcite, Gypsum (Var: Selenite) from Ametista do Sul, Alto Uruguai region, Rio Grande do Sul, South Region, Brazil [db_pics/mdpics/MD-229681b.jpg]](db_pics/mdpics/MD-229681b.jpg)
![Fluorite, Baryte, Calcite from Elmwood mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, Smith Co., Tennessee, USA [db_pics/mdpics/MD-229694a.jpg]](db_pics/mdpics/MD-229694a.jpg)
![Calcite (Var: Cobaltoan Calcite) from Bou Azzer, Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco [db_pics/mdpics/MD-229698a.jpg]](db_pics/mdpics/MD-229698a.jpg)
![Calcite, Duftite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-229703a.jpg]](db_pics/mdpics/MD-229703a.jpg)
![Calcite from Leiyang Co., Hengyang Prefecture, Hunan Province, China [db_pics/mdpics/MD-22971a.jpg]](db_pics/mdpics/MD-22971a.jpg)
![Calcite from Somerset, England, UK [db_pics/mdpics/MD-229715a.jpg]](db_pics/mdpics/MD-229715a.jpg)
![Calcite from Somerset, England, UK [db_pics/mdpics/MD-229715b.jpg]](db_pics/mdpics/MD-229715b.jpg)
![Fluorite, Calcite, Pyrite from El Hammam Mine (El Hamman Mine), Mount Hammam, Meknès, Meknès Prefecture, Meknès-Tafilalet Region, Morocco [db_pics/mdpics/MD-22972a.jpg]](db_pics/mdpics/MD-22972a.jpg)
![Fluorite, Calcite from Naica, Mun. de Saucillo, Chihuahua, Mexico [db_pics/mdpics/MD-229782a.jpg]](db_pics/mdpics/MD-229782a.jpg)
![Malachite, Calcite (Var: Cobaltoan Calcite) from Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) [db_pics/mdpics/MD-229806a.jpg]](db_pics/mdpics/MD-229806a.jpg)
![Malachite, Calcite (Var: Cobaltoan Calcite) from Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) [db_pics/mdpics/MD-229806b.jpg]](db_pics/mdpics/MD-229806b.jpg)