Assertion: gypsum | /r/CapableOf | exist as soft sulfate material
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text: Gypsum exists as a soft sulfate material which is moderately water-soluble and slightly transparent in rock form; selenite, a mass form of gypsum, also reportedly got its name from the Ancient Greeks who named the material after Selene, a Greek moon goddess, for the moon-like quality of the light transferring through the solid mass.