Calcite
We seldom get specimens of pure calcite as it often occurs in association with other mineral specimens.
It is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The other polymorphs are the aragonite and vaterite. Aragonite will change to calcite at 380–470 °C and vaterite is even less stable.
It has a hardness of 3 on the Mohs scale, its specific gravity is 2.71 and its luster is vitreous in crystallized varieties. The color is most commonly white or clear, but can appear gray, red, orange, yellow, green, blue, violet, brown, or even black due to the presence of various impurities.
Showing all 16 results
-
One Box Of 6 Quartz/Malachite/Calcite From Congo
$86.00 Add to cart -
Large Calcite Quartz Mineral Specimen From Congo
$44.00 Add to cart -
Calcite Mineral Specimen With Secondary Growth Phase From Rosh Pinah
$45.00 Add to cart -
Calcite Mineral Specimen With Pyrite Inclusions From Rosh Pinah
$45.00 Add to cart -
Calcite Mineral Specimen With Secondary Growth Phase From Rosh Pinah
$45.00 Add to cart -
Black Tourmaline With Calcite Mineral Specimen From Erongo, Namibia
$155.00 Add to cart -
Black Tourmaline With Calcite Mineral Specimen From Erongo, Namibia
$155.00 Add to cart -
Dioptase/Shattuckite/Placheite/Calacite Mineral Specimen From Congo
$48.00 Add to cart -
Calcite Mineral Specimen From Congo
$46.00 Add to cart -
Manganoan Calcite Mineral Specimens From Kalahari Manganese Fields, South Africa
$59.00 Add to cart -
Manganoan Calcite Mineral Specimens From Kalahari Manganese Fields, South Africa
$54.00 Add to cart -
Stunning, Small Dioptase/Chrysocolla/Malachite/Calcite Mineral Specimen from Congo
$22.00 Add to cart -
Wonderful Dioptase/Chrysocolla/Calcite Mineral Specimen from Kambove, Congo
$54.00 Add to cart -
Beautiful, Large Dioptase/Chrysocolla/Calcite Mineral Specimen from Congo
$92.00 Add to cart -
Delightful Dioptase/Chrysocolla/Calcite Mineral Specimen from Kambove, Congo
$49.00 Add to cart -
One Box Of 24 Orange Calcite Specimens from Orange River, South Africa
$10.00 Add to cart
Showing all 16 results