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礦物之美－（鈣芒硝∼Glauberite）
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GLAUBERITE Na2Ca(SO4)2 (monoclinic)．Steeply bipyramidal crystals．Searles Lake, California／USA．鈣芒硝晶體常呈板狀，雙角錐狀．無色，灰色或淺黃色．透明，半透明．玻璃或珍珠光澤．硬度 2.5∼３．形成於蒸發岩礦床．因溶於水常作為他種礦物的假像∼CAST for calcite, quartz, gypsum and opal. 礦名來源：Named after Glauber's Salt, of alchemist origin. NO.641 |
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