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Please help - seeking Gypsum mineral

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I am trying to find a gypsum mineral that's light brownish in color, glossy and transforms into a white/brownish powder when crushed. Unlike the gypsum used for Plaster of Paris, this gypsum is very soft and crushes easily. With regards to the softness - I wrapped the last piece I had into a cloth and crushed it using the back of a tablespoon.

asked Mar 7, 2013 by WCW (120 points)

1 Answer

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There is only one gypsum mineral, and it is scientifically known as gypsum, which is a hydrous calcium sulfate. There are minerals similar to gypsum such as anhydrite and talc, but there is only one gypsum mineral.

answered Mar 11, 2013 by hershel (51,840 points)

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