Quartz Crystals
by Science Photo Library
Title
Quartz Crystals
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Quartz crystals. Quartz or silicon dioxide (SiO2), one of the commonest minerals in the Earth's crust (12% by volume). The pure, colourless variety is also known as rock crystal and is used as a gemstone and highly prized by collectors. When it contains impurities, these impart a range of colours including white, yellow, pink, blue, green and smoky brown.
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September 21st, 2018
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