#zircon__zirconium_silicate__zirconiumsilicate  a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent
  supertype:  mineral  solid homogeneous inorganic substances occurring in nature having a definite chemical composition
  substance:  zirconium
  subtype:  jacinth__hyacinth  a red transparent variety of zircon used as a gemstone
  subtype:  jargoon  a colorless (or pale yellow or smoky) variety of zircon

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