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zircon

zircon Mineral, ZrSiO4; sp. gr. 4.6; hardness 7.5; tetragonal; most commonly light brown or reddish-brown, but sometimes grey, yellow, or green; vitreous lustre; crystals usually square prisms with bipyramidal terminations; cleavage prismatic, indistinct {110} and poor {111}; one of the most widely distributed accessory minerals in igneous rocks (e.g. granite, syenite, and pegmatites), when the crystals can be quite large, also occurs in metamorphic rocks (e.g. gneisses and schists), and concentrated in detrital beach and river sands. It is the main source of zirconium metal. Common zircon is used extensively in the foundry industry.

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"zircon." A Dictionary of Earth Sciences. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

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"zircon." A Dictionary of Earth Sciences. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/zircon

zircon

zircon Orthosilicate mineral, zirconium silicate (ZrSiO4), found in igneous and metamorphic rocks and in sand and gravel. It displays prismatic crystals. It is usually light or reddish brown, but can be colourless, grey, yellow or green. It is used widely as a gemstone because of its hardness and high refractive index. Hardness 7.5; r.d. 4.6.

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"zircon." World Encyclopedia. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"zircon." World Encyclopedia. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/zircon

"zircon." World Encyclopedia. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/zircon

zircon

zir·con / ˈzərˌkän/ • n. a mineral occurring as prismatic crystals, typically brown but sometimes in translucent varieties of gem quality. It consists of zirconium silicate and is the chief ore of zirconium.

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"zircon." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"zircon." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/zircon-0

"zircon." The Oxford Pocket Dictionary of Current English. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/zircon-0

zircon

zircon (min.) native silicate of the metallic element zirconium. XVIII. — G. zirkon.

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"zircon." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

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"zircon." The Concise Oxford Dictionary of English Etymology. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/zircon-1

zircon

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"zircon." Oxford Dictionary of Rhymes. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"zircon." Oxford Dictionary of Rhymes. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/zircon

"zircon." Oxford Dictionary of Rhymes. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/zircon