|Category||Crystals and geodes|
|Formula CaCO3] ARAGONITE|
|O||Oxygen||Other no metal||47.95%|
|Ca||Calcium||Alkaline earth metal||40.04%|
|C||Carbon||Other no metal||12%|
Aragonite is a common mineral of the carbonate class, which contains calcite and dolomite, most often in equal quantities. With a hardness of 3.5 to 4.0 on the Mohs scale, aragonite is considered the stable orthorhombic form of calcite. It differs from calcite by dissolving faster and having a slight structural difference. Aragonite forms primarily through biogeosynthetic growth, that is, in warm marine environments that promote the formation of shells of marine organisms. It can also form by chemical precipitation in waters that are rich in calcium and carbonates. Aragonite is mainly used in the construction industry, for the manufacture of expanded clay, plaster, concrete and mortar. It is also used as a fertilizer, as a raw material for the manufacture of fertilizers and as an ornamental stone. Aragonite is also sometimes used for the manufacture of pharmaceuticals and cosmetics.
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