zircon


zircon
/zerr"kon/, n.
a common mineral, zirconium silicate, ZrSiO4, occurring in small tetragonal crystals or grains of various colors, usually opaque: used as a refractory when opaque and as a gem when transparent.
[1785-95; < G Zirkon; see JARGON2]

* * *

Silicate mineral, zirconium silicate, ZrSiO4, the principal source of zirconium.

Zircon is widespread as an accessory mineral in acid igneous rocks; it also occurs in metamorphic rocks and, fairly often, in detrital deposits. It occurs in beach sands in many parts of the world, particularly Australia, India, Brazil, and Florida, and is a common heavy mineral in sedimentary rocks. Gem varieties occur in stream gravels and detrital deposits, particularly in Indochina and Sri Lanka, but also in Myanmar, Australia, and New Zealand. Zircon forms an important part of the syenite of southern Norway and occurs in large crystals in Quebec.

Zircon with quartz from Cheyenne Canyon, Colorado

By courtesy of the Field Museum of Natural History, Chicago; photograph, John H. Gerard
EB Inc.

* * *

 silicate mineral, zirconium silicate, ZrSiO4, the principal source of zirconium. Zircon is widespread as an accessory mineral in felsic igneous rocks; it also occurs in metamorphic rocks and, fairly often, in detrital deposits. It occurs in beach sands in many parts of the world, particularly Australia, India, Brazil, and Florida, and is a common heavy mineral in sedimentary rocks. Gem varieties occur in stream gravels and detrital deposits, particularly in Indochina and Sri Lanka, but also in Myanmar (Burma), Australia, and New Zealand. Zircon forms an important part of the syenite of southern Norway and occurs in large crystals in Quebec. For detailed physical properties, see silicate mineral (table).

      The high refractive index and dispersion of zircon cause it to approach diamond in fire and brilliancy. Several varietal names have been applied to coloured gems. hyacinth (jacinth) includes the clear, transparent red, orange, and yellow varieties. Matura diamond, from Sri Lanka, is clear and colourless, either naturally or made so through heat treatment under oxidizing conditions. The name jargon, like zircon derived from Arabic zargūn, applies to all other colours. A lovely blue stone may be made by heat treatment under reducing conditions.

* * *


Universalium. 2010.

Look at other dictionaries:

  • ZIRCON — ZIRC Mot composé à partir du persan, zircon signifie or et lumière. Ce minéral fait partie des silicates à tétraèdres, Si4, isolés (nésosilicates) qui cristallisent, dans le système quadratique, en donnant des formes bitétragonales. Les cristaux… …   Encyclopédie Universelle

  • Zircón — General Categoría Minerales nesosilicatos Clase 9.AD.30 (Strunz) Fórmula química …   Wikipedia Español

  • zircon — ZIRCÓN s.n. Silicat natural de zirconiu, tetragonal, de obicei galben portocaliu, roşu sau verde, foarte dur, folosit pentru obţinerea bioxidului de zirconiu, iar cristalele limpezi ca pietre semipreţioase. – Din fr. zircon. Trimis de valeriu, 13 …   Dicționar Român

  • Zircon — ir con, n. [F., the same word as jargon. See {Jargon} a variety of zircon.] 1. (Min.) A mineral consisting predominantly of zirconium silicate ({Zr2SiO4}) occurring in tetragonal crystals, usually of a brown or gray color. It consists of silica… …   The Collaborative International Dictionary of English

  • Zircón — m. Variante ortográfica de «circón» (piedra preciosa). * * * zircón. m. circón. * * * El zircón o circón es un mineral de color variable perteneciente al grupo de los silicatos …   Enciclopedia Universal

  • zircón — → circón …   Diccionario panhispánico de dudas

  • zircon — (n.) 1794, new name given in chemistry to JACINTH (Cf. jacinth), from Ger. Zirkon (Cf. Fr. jargon, It. giargone), from Arabic zarqun cinnabar, bright red, from Pers. zargun gold colored, from Avestan zari gold colored, from zar gold …   Etymology dictionary

  • zircón — m. circón …   Diccionario de la lengua española

  • zircon — ► NOUN ▪ a mineral consisting of zirconium silicate, typically brown but sometimes in translucent forms of gem quality. ORIGIN German Zirkon …   English terms dictionary

  • zircon — [zʉr′kän΄] n. [Ger zirkon, altered (by Werner: see WERNERITE) < Fr jargon < It giargone < Ar zarqūn, bright red < Pers zargūn, gold colored < zar, gold] a light colored, very hard mineral, zirconium silicate, ZrSiO4, an ore of… …   English World dictionary

  • Zircon — Not to be confused with zirconia or cubic zirconia. This article is about the mineral. For other uses, see Zircon (disambiguation). Zircon Zircon crystal from Tocantins, Brazil (2×2 cm) …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.