Gypsum Is a delicate sulfate mineral composed of calcium sulfate dihydrate, Along with the chemical components CaSO4·2H2O.[four] It can be broadly mined and is also utilized for a fertilizer and because the key constituent in several types of plaster, drywall and blackboard or sidewalk chalk. Gypsum has become the oldest https://www.propanraya.com/id/produk/eco-gypsum-ee-4050
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