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 1–24 of 44 results

  • 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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  • Delightful, Dainty Dioptase/Calcite Mineral Specimen from the Congo

    Sale! $68.00 $34.00
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  • One Box of 12 Dioptase/Chrysocolla/Calcite Mineral Specimens from Kambove, Congo

    $195.00
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  • One Box of 6 Stunning Dioptase/Chrysocolla/Calcite Mineral Specimens from Kambove, Congo

    $110.00
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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 6 Stunning Dioptase Dominant Mineral Specimens from Kambove, Congo

    $80.00
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  • One Box of 15 Unusual Malachite Mineral Specimens from Congo

    $82.00
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  • One Box of 6 Very Pretty Polished Shattuckite Mineral Specimens from Congo

    $68.00
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  • One Box of 6 Lovely Polished Shattuckite/Malachite Specimens from the Congo

    $48.00
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  • One box of 7,4 Assorted Mineral Specimens(Large Libethenite Deposits on Some) from Congo

    $470.00
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  • Magnificent Diopside with Calcite Display Piece from Congo

    $96.00
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  • One Box of 9,3Kg Cobaltion Calcite, Many with Secondary Minerals (Especially Libethenite) from Congo

    $591.00
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Showing 1–24 of 44 results