#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

No statement uses or specializes #zircon; click here to add one.