Natural Raw Blue Calcite (4pcs) sedimentary iron minerals precipitate within

sedimentary iron minerals precipitate within partially dissolved limestones and dolomites during ancient periods of low oxygen concentration when the earth's atmosphere was richer in free oxygen

perforated + leather rope

Copper Queen Mine of Bisbee and Arizona

Blue calcite varies in colour from a slightly tinted greenish yellow

Grant and Socorro counties in New Mexico

Natural Raw Blue Calcite (4pcs) sedimentary iron minerals precipitate withinA blue calcite variation is due to the presence of oxidised copper impurities within the crystals. These particular samples also show the rhombic crystal structure of calcite and can easily be seen with the naked eye. Blue calcite varies in colour from a slightly tinted greenish yellow, to an intense sky clear golden yellow, as well as a near white light reflecting honeycomb structure. Details Quantity: 4pcs Crystal: Blue Calcite