| 单词 | zircon |
| 释义 | Word Frequency zircon(ˈzɜːkɒn) noun 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 Word origin C18: from German Zirkon, from French jargon, via Italian and Arabic, from Persian zargūn golden |
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