Zircon biography, Zircon discography
Today, Zircon sells more than two dozen unique electronic tools for a variety of jobs.For the spy satellite of this codename see Zircon (satellite).This article is about the natural mineral Zircon.For the chemically different synthetic diamond substitute, see Cubic zirconia.Zircon is a mineral belonging to the group of nesosilicates.Its chemical name is zirconium silicate and its corresponding chemical formula is ZrSiO4.The crystal structure of zircon is tetragonal crystal class.It is not to be confused with cubic zirconia, a synthetic substance with a completely different chemical composition.Yellow zircon is called hyacinth, from a word of East Indian origin; in the Middle Ages all yellow stones of East Indian origin were called hyacinth, but today this term is restricted to the yellow zircons.Zircon is regarded as the traditional birthstone for December.Zircon is a remarkable mineral, if only for its almost ubiquitous presence in the crust of Earth.Large zircon crystals are seldom abundant.Owing to their uranium and thorium content, some zircons may undergo metamictization.This partially disrupts the crystal structure and explains the highly variable properties of zircon.In the United States: Litchfield, Maine; Chesterfield, Massachusetts; in Essex, Orange, and St.Zircon can come in red, brown, yellow, hazel, black, or colorless.The color of zircons below gem quality can be changed by heat treatment.Zircons are commercially mined for the metal zirconium, and are used for abrasive and insulating purposes.It is the source of zirconium oxide, one of the most refractory materials known.Zirconium metal is used in nuclear reactors due to its neutron absorption properties.Large specimens are appreciated as gemstones, owing to their high refractive index (zircon has a refractive index of around 1.Zircon is a common accessory to trace mineral constituent of most granite and felsic igneous rocks.Due to its hardness, durability and chemical inertness, zircon persists in sedimentary deposits and is a common constituent of most sands.Zircons and radiometric dating
The pervasive occurrence of zircon has become more important since the discovery of radiometric dating.These zircons might not only be the oldest minerals on earth, they also show another interesting feature.Their oxygen isotopic composition has been interpreted to indicate that more than 4.Perhaps the oxygen isotopes and other compositional features (the rare earth elements) record more recent hydrothermal alteration of the zircons rather than the composition of the magma at the time of their original crystallization.Reviews in Mineralogy and Geochemistry, volume 53, 500 pages.Neues Jahrbuch Mineralogische Monatshefte 9: pp.Pb zircon ages: An evaluation".Tondar (1991): Zirkonmorphologie als Charakteristikum eines Gesteins."On the kinematics of zircon growth and its petrogenetic significance: a cathodoluminescence study"."Systematics of internal zircon morphology in major Variscan granitoid types".Retrieved on 11 April, 2005.All text is available under the terms of the GNU Free Documentation License.Hindu poets tell of the Kalpa Tree, the ultimate gift to the gods, a glowing tree covered in gemstone fruit with leaves of zircon.In the middle ages, zircon was said to aid sleep, bring prosperity, and promote honour and wisdom in its owner.Many people are unaware that there is a beautiful natural gemstone called zircon.Zircon occurs in a wide range of colours, but for many years the most popular was the colourless variety, which looks more like diamond than any other natural stone because of its brilliance and dispersion.Today the most popular colour is blue zircon, which is considered an alternative birthstone for December.Most blue zircon is of a pastel blue, but some exceptional gems have a bright blue colour.Zircon is also available in green, dark red, yellow, brown, and orange.Zircon is mined in Cambodia, Sri Lanka, Thailand, Myanmar, Australia, and other countries.Zircon is one of the heaviest gemstones, which means that it will look smaller than other varieties of the same weight.Zircon jewellery should be stored carefully because although it is relatively hard, zircon can suffer from abrasion and the facets can be chipped.Dealers often wrap zircons in individual twists of paper so that they will not knock against each other in a parcel.The wide variety of colours of zircon, its rarity, and its relatively low cost make it a popular collector's stone.Zircon will help you tell your
story so that final reports are a snap!Zircon's commitments to a greener world.Zircon
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Sri Lanka (Ceylon), Thailand, Myanmar (Burma), Cambodia, Vietnam, Kampuchea, Australia, Brazil, Nigeria, Tanzania and France.Zircon and turquoise are the birthstones of the month of December.Appearance
Zircon, a naturally occurring gemstone, has colorless, yellow, orange, red, blue, brown and green varieties.Zircon, by it's name, is sometimes confused with cubic zirconia ("CZ"), which is synthetic.Zircon has a high refractive index which is responsible for it's diamond like appearance.Zircon can be distinguished from diamond by it's double refraction and by wear and tear of it's edges, as compared to diamond which is very much harder.Enhancements
Green and brown colors of zircon are not enhanced.Yellow zircon is rarely heat treated to improve color.Blue, red and colorless are always heat treated brownish crystals to produce these colors.More information on gemstone enhancements.Calibrated Zircon
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