Zircon sand is a tetragonal system with a square pyramidal shape with a specific gravity of 4.6~4.71, a uniform Mohs hardness of 7-8, a refractive index of 1.93-2.01, and a melting point fluctuating within 2190~2420 °C depending on the impurities contained. It is a tetragonal system, often in the form of a well-developed cone-shaped small square cylinder, which is also irregularly granular. Sexually brittle, fractured shell-like. It is a high quality refractory material. It is symbiotic with ilmenite, rutile, monazite and xenotime in coastal sand, and is obtained after sorting by water separation, electric selection and magnetic separation.
