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 1–40 of 41 results

  • Calcite Mineral Specimen With Secondary Growth Phase From Rosh Pinah

    $45.00
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  • Calcite Mineral Specimen With Pyrite Inclusions From Rosh Pinah

    $45.00
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  • Calcite Mineral Specimen With Secondary Growth Phase From Rosh Pinah

    $45.00
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  • Black Tourmaline With Calcite Mineral Specimen From Erongo, Namibia

    $155.00
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  • Black Tourmaline With Calcite Mineral Specimen From Erongo, Namibia

    $155.00
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  • Dioptase/Shattuckite/Placheite/Calacite Mineral Specimen From Congo

    $48.00
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  • Dioptase/Shattuckite/Placheite/Calacite Mineral Specimen From Congo

    $48.00
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  • Dioptase/Shattuckite/Placheite/Calacite Mineral Specimen From Congo

    $48.00
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  • Calcite Mineral Specimen From Congo

    $46.00
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  • Manganoan Calcite Mineral Specimens From Kalahari Manganese Fields, South Africa

    $109.00
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  • Manganoan Calcite Mineral Specimens From Kalahari Manganese Fields, South Africa

    $59.00
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  • Manganoan Calcite Mineral Specimens From Kalahari Manganese Fields, South Africa

    $54.00
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  • Manganoan Calcite Mineral Specimens From Kalahari Manganese Fields, South Africa

    $72.00
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  • Shattuckite/Calcite Mineral Specimen From Congo

    Sale! $62.00 $31.00
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  • Shattuckite/Calcite Mineral Specimen From Congo

    Sale! $52.00 $26.00
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  • Stunning, Small Dioptase/Chrysocolla/Malachite/Calcite Mineral Specimen from Congo

    $22.00
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  • Wonderful Dioptase/Chrysocolla/Calcite Mineral Specimen from Kambove, Congo

    $54.00
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  • Beautiful, Large Dioptase/Chrysocolla/Calcite Mineral Specimen from Congo

    $92.00
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  • Delightful Dioptase/Chrysocolla/Calcite Mineral Specimen from Kambove, Congo

    $49.00
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  • Delightful Plancheite/Shattuckite/Calcite Mineral Specimen from Congo

    $32.00
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  • One Pretty Dioptase/Shattuckite/Calcite Mineral Specimen from Congo

    $60.00
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  • One Delightful Diopside/Calcite Mineral Specimen from Congo

    $47.00
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  • Gorgeous Dioptase/Calcite Mineral Specimen from Congo

    Sale! $126.00 $63.00
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  • Lovely, Large Dioptase/Calcite Mineral Specimen from the Congo

    Sale! $546.00 $273.00
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  • Cobaltion Calcite/Calcite Mineral Specimen from Congo

    $12.77
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  • Very Interesting Plancheite/Shattuckite/Calcite Mineral Specimen from Kambove, Congo

    $50.00
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  • Interesting Shattuckite/Calcite/Quartz Display Piece from Kambove, Congo

    $175.00
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  • One Box of 15 Unusual Malachite Mineral Specimens from Congo

    $82.00
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  • Magnificent Diopside with Calcite Display Piece from Congo

    $96.00
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  • One Gorgeous, Large Diopside/Calcite Specimen from Congo

    Sale! $110.00 $55.00
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  • Beautiful Diopside/Calcite Mineral Specimen from Congo

    Sale! $22.00 $11.00
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  • Diopside/Calcite Mineral Specimen From Congo

    $68.00
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  • Liberthenite/Calcite Mineral Specimen From Congo

    $49.00
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  • Liberthinite/Calcite Mineral Specimen From Congo

    $62.00
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  • Liberthinite/Calcite Mineral Specimen From Congo

    $32.00
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  • Liberthenite/Calcite Mineral Specimen From Congo

    $54.00
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  • Liberthenite/Calcite Mineral Specimen From Congo

    $42.00
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  • One Box Of 24 Orange Calcite Specimens from Orange River, South Africa

    $10.00
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  • Gorgeous Braunite/Calcite Specimen From N`Chwaning II, KMF, South Africa

    $18.00
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  • Beautiful Calcite Flower Specimen From KMF

    $24.00
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Showing 1–40 of 41 results