Quartz is a chemical compound consisting of one part silicon and two parts oxygen. It is silicon dioxide. It is the most abundant mineral found at Earth's surface, and its unique properties make it one of the most useful natural substances.Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz.Quartz belongs to the trigonal crystal system. The ideal crystal shape is a six-sided prismterminating with six-sided pyramids at each end. 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. It is abundant in igneous, metamorphic, and sedimentary rocks.
Quartz is a defining constituent of granite and other felsic igneous rocks. It is very common in sedimentary rocks such as sandstone and shale.While the majority of quartz crystallizes from molten magma, much quartz also chemically precipitates from hot hydrothermal veins as gangue, sometimes with ore minerals like gold, silver and copper. Large crystals of quartz are found in magmatic pegmatites. Well-formed crystals may reach several meters in length and weigh hundreds of kilograms. A major mining location for high purity quartz is the Spruce Pine Gem Mine in Spruce Pine, North Carolina, United States.Quartz may also be found in Caldoveiro Peak, in Asturias, Spain.
Color:Quartz occurs in virtually every color. Common colors are clear, white, gray, purple, yellow, brown, black, pink, green, red.
Mophs Hardness: 7
Uses: Glass making, abrasive, foundry sand, hydraulic fracturing proppant, gemstones.
-Varieties (according to color)
Amethyst
Amethyst is a shape of quartz that stages from a shiny to dark shade. The international’s biggest deposits of amethysts may be located in Brazil, Mexico, Uruguay, Russia, France, Namibia and Morocco.
Blue quartz
Blue quartz contains inclusions of fibrous magnesio-riebeckite or crocidolite.
Citrine
Citrine is a spread of quartz whose colour levels from a faded yellow to brown because of ferric impurities
.Milky quartz
Milk quartz or milky quartz is the most not unusual kind of crystalline quartz. The color of it is white.
Rose quartz
A type of quartz which exhibits a pale purple to rose red hue.
Smoky quartz
Smoky quartz is a grey, translucent model of quartz. It ranges from nearly entire transparency to a brownish-grey crystal that is almost opaque.
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