Zircon
WordNet

noun


(1)   A common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent
WiktionaryText

Etymology


From Zirkon or zircone < (zarqūn) ‘cinnabar, bright red’.

Noun


  1. A mineral occurring in tetragonal crystals, usually of a brown or grey colour and consisting of silica and zirconia.
  2. A crystal of zircon, sometimes used as a false gemstone.
 
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