Zircon
Zircon , noun
[French, the same word as jargon. See Jargon a variety of zircon.]
1.
(Mineralogy) A mineral consisting predominantly of zirconium silicate (Zr2SiO4) occurring in tetragonal crystals, usually of a brown or gray color. It consists of silica and zirconia. A red variety, used as a gem, is called hyacinth. Colorless, pale-yellow or smoky-brown varieties from Ceylon are called jargon.
2.
an imitation gemstone made of cubic zirconia.
Collocations (1)
Zircon syenite , a coarse-grained syenite containing zircon crystals and often also elaeolite. It is largely developed in Southern Norway.