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Selenite is a crystal formed from the mineral gypsum
neither a crystal nor a mineral
Cherry Quartz is a manmade mixture of clear glass with swirls and flecks of deep pink
although sometimes mistaken for Jasper
Princess Patricia of Connaught
Biotite 6mm Round Orange - 15-16 Inch Shattuckite6mm Selenite is a crystal formedBiotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks. These include annite, phlogopite, siderophyllite, fluorophlogopite, fluorannite, eastonite, and many others. The name "biotite" is used because these minerals generally cannot be distinguished without optical, chemical, or x ray analysis. Biotite was named in honor of the French physicist Jean Baptiste Biot, who performed early
