Granite. According to definitions, granite must contain 25% quartz while diorite/andesite cannot contain more than 5% quartz and basalt/gabbro cannot contain any quartz.
2007-10-12 17:31:44
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answer #1
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answered by Amphibolite 7
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The name "quartz" comes from the German "Quartz", which is of Slavic origin (Czech miners called it křemen). Other sources insist the name is from the Saxon word "Querkluftertz", meaning cross-vein ore
Major Varieties Chalcedony Any cryptocrystalline quartz, although generally only used for white or lightly coloured material. Otherwise more specific names are used.
Agate Multi-coloured, banded Chalcedony, semi-translucent to translucent
Onyx Agate where the bands are straight, parallel and consistent in size.
Jasper Opaque chalcedony, impure
Aventurine Translucent chalcedony with small inclusions (usually mica) that shimmer.
Tiger's eye Fibrous gold to red-brown coloured quartz, exhibiting chatoyancy.
Rock crystal or mountain crystal Clear, colourless
Amethyst Purple, transparent
Citrine Yellow to reddish orange to brown, greenish yellow
Prasiolite Mint green, transparent
Rose quartz Pink, translucent, may display diasterism
Milk quartz or snow quartz White, translucent to opaque, may display diasterism
Smoky quartz Brown to grey, opaque
Morion Dark-brown, opaque
Carnelian Reddish orange chalcedony, translucent
Hence quartz is most contained by granite which is 26.8675 %
2007-10-12 19:04:53
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answer #3
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answered by Anonymous
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that's the main substantial mineral on earth, so which you will locate it in only about all sedimentary rocks, besides as many igneous rocks. In metamorphic rocks, that's frequently been metamorphosed into quartzite.
2016-12-14 16:13:54
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answer #4
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answered by Anonymous
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