Goshenite crystal embedded in orthoclase

Goshenite crystal embedded in orthoclase

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Credit: ROBERTO DE GUGLIEMO/SCIENCE PHOTO LIBRARY

Caption: Goshenite, a variety of beryl (beryllium aluminium sillicate), growing on crystals of orthoclase (potassium aluminium silicate). Beryl occurs in many colours including grayish-white, yellowish- white, pale bluish-green and, more rarely, transparent yellow (heliodor), pink (morganite), blue (aquamarine) and green (emerald). The rare, transparent varieties are used as gemstones, while the more common types form the principal ore of the metal beryllium, which is widely used in industrial alloys. This specimen measures 12 x 10 cm and was found in Veadinho's Mine, Marilac, Brazil.

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Keywords: beryl, beryllium, beryllium ore, earth science, geology, goshenite, ore, variety goshenite

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