Sulfate mineral
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The sulfate minerals are a class of minerals that include the sulfate ion within their structure. The sulfate minerals occur commonly in primary evaporite depositional environments, as gangue minerals
Barite with cerussite
Hanksite, one of the rare minerals that is a sulfate and carbonate
Gypsum
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Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is widely mined and is used as a fertilizer and as the main constituent in many forms o
Sulfate mineral
…Anhydrous sulfates Barite BaSO4 Celestite SrSO4 Anglesite PbSO4 Anhydrite CaSO4 Hanksite Na22K(SO4)9(CO3)2Cl Hydroxide and hydrous sulfates Gypsum CaSO4·2H2O Chalcanthite CuSO4·5H2O Kieserite MgSO4·H2O Starkeyite MgSO4·4H2O Hexahydrite MgSO4·6H2O Epsomite MgSO4·7H2O Meridianiite MgSO4·11H2O…
Gypsum from southwest France (27 × 22 cm)
Gypsum crystals are soft enough to bend under pressure of the hand. Sample on display at Musée cantonal de géologie de Lausanne.
Large gypsum crystals in Lechuguilla Cave's "chandelier ballroom"
Gypsum crystals in the Cave of the Crystals in Mexico (person at lower right for scale)