Outstanding Rare Natural Yellow Gypsum Selenite Collectors Piece Statement Piece Stand IncludedOutstanding Rare Natural Yellow Gypsum Selenite Collectors Piece Statement Piece Stand Included Weight 0. 095kg Size 4cm by 6. 5cm Thickness 7cm Gypsum crystals are found to contain anion water and hydrogen bonding. Gypsum occurs in nature as flattened and often twinned crystals, and transparent, cleavable masses called selenite. Selenite contains no significant selenium; rather, both substances were named for the ancient Greek word for the Moon. The