|Mineral class||Silicates : Phyllosilicates : Mica group.|
|Habitus||Rarely as small hexagonal crystals. Often as books of mica.|
|Color||Black, dark brown, reddish brown, green and rarely white.|
|Occurance||Common in both igneous and metamorphic rocks.|
|Notes||Soluble in concentrated sulfuric acid.|
|Locations|| A very common mineral with big crystal books at
many places, for instance :|
| To silicate index.
|| Mineral group index.
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