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Can Angelite go in the Water? (And in Sunlight?)

Angelite is a kind of anhydrite or anhydrous calcium sulfate (CaSO4). It is a semi-transparent bluish-grey mineral that was first discovered in Peru during the late 20th century. The mineral’s name comes from the term “anhydrous”, meaning “without water”, referring to the fact that anhydrite is gypsum without water.  In this article, we are going …

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