calcite
3
Coin
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Calcite (Calcite) is a common calcium carbonate mineral with a chemical formula of CaCO. It is widely found in sedimentary rocks, metamorphic rocks and igneous rocks. Calcite has unique optical properties such as birefringence and birefringence. Veins usually form when calcite is intergrown with ore minerals. In these veins, calcite may be the main component, but may also contain other valuable ore minerals, such as pyrite, sphalerite, barite, etc. These ore minerals are usually formed in low temperature hydrothermal veins.
