a reddish-brown, grey, green, blue, or colourless hard mineral consisting of zirconium silicate in tetragonal crystalline form with hafnium and some rare earths as impurities. It occurs principally in igneous rocks and is an important source of zirconium, zirconia, and hafnia: it is used as a gemstone and a refractory. Formula: ZrSiO4
C18: from German Zirkon, from French jargon, via Italian and Arabic, from Persian zargūn golden
1794, new name given in chemistry to jacinth, from German Zirkon (cf. French jargon, Italian giargone), from Arabic zarqun "cinnabar, bright red," from Persian zargun "gold-colored," from Avestan zari- "gold-colored," from zar "gold."
(zûr'kŏn') A brown, reddish to bluish, gray, green, or colorless tetragonal mineral that occurs in igneous, metamorphic, and sedimentary rocks, and especially in sand. The colorless varieties are valued as gems. Chemical formula: ZrSiO4.