GYPSUM
Product Details
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 of plaster, blackboard/sidewalk chalk, and drywall.
Category: Sulfate minerals
Mohs scale hardness: 1.5–2 (defining mineral
Selenite: Transparent and bladed crystals
Alabaster: Fine-grained, slightly colored
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