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Quartz - Wikipedia

en.wikipedia.org/wiki/Quartz

Quartz is the second most abundant mineral in Earth's continental crust, after feldspar. .... Large crystals of quartz are found in magmatic pegmatites. Well- formed ...

Quartz Mineral | Photos, Uses, Properties, Pictures - Geology.com

geology.com/minerals/quartz.shtml

Quartz is the most abundant and widely distributed mineral found at Earth's surface. It is present and plentiful in all parts of the world. It forms at all temperatures.

Quartz | Minerals Education Coalition

mineralseducationcoalition.org/minerals-database/quartz/

As a mineral name, quartz refers to a specific chemical compound (silicon dioxide, or silica, SiO2), having a specific crystalline form (hexagonal). It is found is all ...

Quartz Facts: Geology of the World - WorldAtlas.com

www.worldatlas.com/articles/quartz-facts-geology-of-the-world.html

Feb 9, 2016 ... Even though quartz is a widely occurring mineral, quartz crystals of high purity are, however, rarely found. The Spruce Pine Gem Mine in North ...

Where can you find quartz? | Reference.com

www.reference.com/science/can-quartz-a1449a17f10d43bc

Natural quartz is found in many countries and geologic locations, including the United States, Mexico, Brazil, Uruguay, Russia, France, Namibia and Morocco.

The Quartz Page: Occurrence

www.quartzpage.de/gen_occ.html

Sep 22, 2011 ... Quartz is often found in veins that cut through rocks. Although the term "vein" suggests this, the veins of quartz and other minerals are usually ...

The Quartz Page: Quartz as a Rock-Forming Mineral

www.quartzpage.de/gen_rock.html

Oct 3, 2014 ... On the other hand, the continental crust contains large amounts of granitic rocks that are rich in quartz, so almost all quartz is found in the ...

Gemstones - Quartz - U.S. Geological Survey

minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95/quartz.html

Dec 30, 2016 ... Rock crystal quartz, the most common gem variety of quartz crystal, is, like all ... For many years cobbles and round crystals have been found in ...

Quartz: The mineral Quartz information and pictures

www.minerals.net/mineral/quartz.aspx

Detailed properties and locality information guide on the mineral quartz, ... Light green, translucent form of Quartz with Hedenbergite inclusions found on Serifos ...

Quartz: Quartz mineral information and data. - Mindat.org

www.mindat.org/min-3337.html

Quartz is the most common mineral found on the surface of the Earth. If pure, quartz forms colorless, transparent and very hard crystals with a glass-like luster.