|Mineral class||Silicates : Quartz - Opal group.|
|Habitus||As hexagonal prisms with rhomboedric terminations. Also common in dense masses or grainy aggregates.|
|Color||Usually white or colorless, but also exists in yellow, purple, pink, green, blue, gray or black.|
|Streak||Colorless to white.|
|Luster||Vitreous on crystals, greasy in massive.|
|Description||Quartz is one of the most commonly minerals on the Earth. It have several industrial uses, for example as a main part in glas or as the base for manufacturing silicon wafers for the electronics industry.|
|Occurance||In many different rocks as igneous, metamorphic and sedimentary. As a main part in pegmatites and hydrothermal veins.|
|Notes|| Some variants of quartz are :|
|Locations|| A very common mineral, a few localities are :|
Milky quartz :
| To silicate index.
|| Mineral group index.
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