Question: what is the difference between zircon and cubic zirconia?
Answer: Zircon is made of zirconium silicate, whereas cubic zirconia is made of zirconium oxide. ... Zircon is a natural gemstone. Natural zircon is rare and more expensive than cubic zirconia. In terms of hardness, cubic zirconia ranks 8.5 and zircon ranks 7.5 on the Mohs scale.