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navigate by keyword : agate also and background but color crafts crystal crystallized cube cubic detail earth edge faces frequently gemstones geological geologist geology globular goethite granular intergrown iridescent isolated jewels macro massive may mica minecraft minerals octahedral often ore ores photography pirite polished precious purple pyritohedron radiated rare raw shaped sharp shiny stalactitic stone stones striated texture white |
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The mica group of sheet silicate phyllosilicate minerals includes several closely related materials having nearly perfect basal cleavage. All are monoclinic, with a tendency towards pseudohexagonal crystals, and are similar in chemical composition. The nearly perfect cleavage, which is the most prominent characteristic of mica, is explained by the hexagonal sheet-like arrangement of its atoms.nnThe word mica is derived from the Latin word mica, meaning a crumb, and probably influenced by micare, to glitter. |
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