Green Calcite - Mineral Specimen
A widespread mineral, found in highly variable forms and colours. Calcite is best recognized by its relatively low Mohs hardness and its high reactivity with even weak acids, such as vinegar, plus its prominent rhombohedral cleavage in most varieties. This example of a green piece hails from the Coahuila region of Mexico.
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150x80x90mm, 3.7kg approx