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N. Africa Calcite Mineral Specimen #7

$15.00

Mineral Collection

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Description

  • Calcite Cluster
  • North Africa

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 3 as “calcite”.

Other polymorphs of calcium carbonate are the minerals aragonite and vaterite.