Quartz is a hard, crystalline mineral composed of silica .
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10 Facts About Quartz
2.
Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar.
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3.
Quartz is the mineral defining the value of 7 on the Mohs scale of hardness, a qualitative scratch method for determining the hardness of a material to abrasion.
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4.
Quartz is a defining constituent of granite and other felsic igneous rocks.
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5.
Quartz has the lowest potential for weathering in the Goldich dissolution series and consequently it is very common as a residual mineral in stream sediments and residual soils.
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Ireland6.
Quartz is the most common material identified as the mystical substance maban in Australian Aboriginal mythology.
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7.
Quartz was used in Prehistoric Ireland, as well as many other countries, for stone tools; both vein quartz and rock crystal were knapped as part of the lithic technology of the prehistoric peoples.
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8.
Quartz knew of the ability of quartz to split light into a spectrum.
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9.
Quartz discovered that regardless of a quartz crystal's size or shape, its long prism faces always joined at a perfect 60° angle.
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10.
Quartz crystals have piezoelectric properties; they develop an electric potential upon the application of mechanical stress.
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