Zircon's main chemical composition: zirconium silicate; Its chemical composition is Zr[SiO], and the crystals are island silicate minerals of the quadrangular system. The crystals are short columnar, usually a polymorphism of quadrangle, quadrangle dipyramidal or ditetragonal dipyramidal. Zircon comes in a variety of colors, including colorless, magenta, golden yellow, pale yellow, garnet, olive green, champagne, pink, violet blue, apple green, and generally colorless, blue and red. The dispersion is 0.039 (high). The luster is from strong glass luster to adamantine luster. No cleavage. Mohs hardness 6 ~ 7.5, specific weight, density: most in 3.90 ~ 4.73 g/cm. Height: 4.60 ~ 4.80 g/cm. Medium size: 4.10 ~ 4.60 g/cm. Low: 3.90 ~ 4.10 g/cm.