Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O.[3] It can be used as a fertilizer, is the main ...
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Gypsum is an industrially important mineral. It is the primary ingredient of plaster-of-Paris, which is finely ground Gypsum, and it is used in the production of cement.
The Naica mine with its enormous gypsum crystals may well be called the "Queen of the Giant Crystal localities". Giant crystals in general are exactly this : of ...
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2012-1-5 · THE AUSTRALIA HISTORIC COLLECTIONS Kedatangan Orang Inggris ke Australia 1788-1829 oleh Ida Lee (Mrs Charles Bruce Marriott) LIMA PULUH LIMA ...