Blue calcite

Blue Calcite Natural Mineral Rough From Androy Region Madagascar Size- 13.3cm x 8cm x 5.5cm Weight- 660g You will receive the item in the photo Blue calcite is a beautiful calming sky to medium blue variety of calcium carbonate. Its unique pastel colour comes from trace inclusions and natural exposure to ionizing radiation. It is a relatively soft mineral with a MOHs hardness rating of 3. Blue calcite belongs to the trigonal crystal system and carbonate in the mineral class. Blue calcite primarily forms in sedimentary environments e.g massive beds of limestone,chalk or marine fossil accumulation. It also can occur in hydrothermal veins,hot springs and metamorphic rocks such as marble.