 
Word
zircon, n.
(zircons)
 a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent  
<noun.substance>
zircon
zirconium silicate
a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent  
<noun.substance>
zircon
zirconium silicate
 
semantic pointers
substance meronym
hypernym
hyponym