GYPSUM CaSO4·2H2O (monoclinic) . Canada . Selenite Rose∼occurs in rosette-shape aggregates,often incorporating grains of sand. 石膏成份為含水硫酸 鈣，晶體多作厚或薄板狀，珍珠光澤．硬度２．無色透明稱之為∼Selenite． 本礦由多片板狀結晶交叉成玫瑰狀．由史宗文先生提供．

經典名礦欣賞．２．３．４
NO.398