Flogopite: mineral belonging to the Mica group (which also includes Biotite, Muscovite, Zinnwaldite, and Lepidolite), with chemical formula KMg3 [(F,OH)2 AlSi3O10]. It ranges from translucent to transparent, has a metallic to pearly luster, and varies in color from gray to yellow, greenish to brown, and sometimes colorless. It crystallizes in the monoclinic system and appears as tabular crystals or scaly to coarse foliated aggregates. Found in pegmatites and metamorphic rocks.
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