A

David

Darling

zircon

zircon crystals

Zircon crystals.


Zircon is a hard silicate mineral (ZrSiO4) and a major ore of zirconium of widepsread occurrence. Zircon forms prismatic crystals in the tetragonal system, which when transparent are used as gems. They may be colorless, red, orange, yellow, green, or blue, and have a high refractive index.