22109 - Top Beautiful Huge 5.27 Inch Calcite Crystals from South Morocco Ceratodus humei Looks like a sedimentary breccia
Description
22109 Top Beautiful Huge 5.27 Inch Calcite Crystals from South Morocco Ceratodus humei Looks like a sedimentary breccia Looks like a sedimentary breccia cemented by iron oxide and carbonate Goldillaenus Aragonite will change to calcite over timescales of days or less at temperatures exceeding 300 °C and vaterite is even less stable The Mohs scale of mineral hardness
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