Monohydrocalcite
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Monohydrocalcite is a mineral that is a hydrous form of calcium carbonate, CaCO3·H2O. It was formerly also known by the name hydrocalcite, which is now discredited by the IMA. It is a trigonal mineral
Colorless monohydrocalcite crystals
The crystal structure of monohydrocalcite. Ca is shown as a blue atom, O atoms red, and the carbonate anion and water molecules are shown as bonded entities.
Calcite
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Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate. It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale o
Rhombohedral calcite
Scalenohedral calcite
Prismatic calcite
Prismatic calcite