Calcite

 

Calcite is a calcium carbonate (CaCO3). Its crystals are trigonal-rhombohedral, however, they show a remarkable variety of habits including acute to obtuse rhombohedron, tabular forms, prisms, or various scalenohedral. Calcite exhibits several twinning types adding to the variety of observed forms. It may occur as fibrous, granular, lamellar, or compact. Cleavage is usually in three directions parallel to the rhombohedron form. Its fracture is conchoidal, but difficult to obtain.

It has a defining Mohs hardness of 3. Its luster is vitreous in crystallized varieties. Color is white or colorless, though shades of gray, red, orange, yellow, green, blue, violet, brown, or even black can occur due to impurities. Masses of Calcite also tend to be light colored, but as with the transparent crystals, the presence of even minor amounts of impurities can create a wide range of colors.
 
 
 
 
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Calcite-01- Pachapaqui Peru
White Mangano Calcite crystal with translucid crystal faces. This is a large specimen, no damag..
$75.00 USD
Ex Tax: $75.00 USD
Calcite-02- Polaris Mine Canada
Very interesting rare specimen from the Polaris Mine, Little Cornwallis Island, Nunavut, Canada. The..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-03- Elmwood Tennessee
Old crystallized specimen of Calcite from the Elmwood mine, Carthage, Smith Co., Tennessee, USA. ..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-04- Sainte-Clotilde Canada
Colorless grayish Calcite associated with pink Dolomite and micro-Pyrite resting on c..
$40.00 USD
Ex Tax: $40.00 USD
Calcite-05- Denton Mine Illinois
Cognac colored Calcite found in the '70s from Denton mine, Illinois - Kentucky Fluorspar Distri..
$90.00 USD
Ex Tax: $90.00 USD
Calcite-06- Brushy Creek Mine USA
Calcite partially covered by micro-Chalcopyrite, from Brushy Creek Mine, Greeley, Viburnum Trend Dis..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-07- Morocco
Calcite with fluorite and pyrite on calcareous matrix from Morocco. 10.0 x 7.0 x 4.5 cm (Cabinet)..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-08- Inverhuron Canada
Calcite on carbonaceous rock. Specimen from Inverhuron, Kincardine Township, Bruce Co., Ontario..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-09- Minerva No. 1 Mine Illinois
Calcite in dogtooth crystal forms on purple fluorite from Minerva No. 1 Mine, Cave-in-Rock, Ill..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-10- Smith County Tennessee
Calcite and red Sphalerite from Smith Co., Tennessee, USA. 4.0 x 2.9 x 2.0 (Miniat..
$35.00 USD
Ex Tax: $35.00 USD
Calcite-11- Missouri USA
Calcite with Chalcopyrite and Dolomite from Missouri, USA. 11 x 6.4 x 4.2 cm (Large Cabinet)..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-12- Minerva No. 1 Mine Illinois
Yellowish Calcite with purple Fluorite from the Minerva No. 1 Mine, Cave-in-Rock, Illinois - Kentuck..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-13- Hunan China
Brown translucent crystals of Calcite on matrix. From the Hunan Province, China. 11.5 x 7.7 ..
$18.00 USD
Ex Tax: $18.00 USD
Calcite-14- Minerva No. 1 Mine Illinois
Transparent ''Dog tooth'' Calcite on black Sphalerite matrix, from the Minerva No. 1 Mine, Cave-in-R..
$0.00 USD
Ex Tax: $0.00 USD
Calcite-15- Hunan China
Tangerine color Calcite on white Calcite matrix, Hunan Province, China. 7.3 x 4.8 x 2.5..
$0.00 USD
Ex Tax: $0.00 USD