Zircon (English name: zinc) is a silicate mineral, which is the main ore for refining zirconium metal and contains impurities such as Hf, Th, U and TR. Zircon widely exists in acidic igneous rocks, metamorphic rocks and other sediments. The chemical properties of zircon are very stable, so gem-grade zircon can also be seen in river gravel. There are many kinds of zircon, and different zircon will have different colors, such as black, white, orange, brown, green or colorless and transparent. The cut gem-grade zircon looks like a diamond. Zircon used to be called zircon.