The common colors of zircon are colorless, 青, 黄色, 緑, 茶色, 赤, そして紫. According to the degree of crystallinity, zircon can be divided into three varieties: high type, medium type and low type. The refractive index, 密度, and hardness value gradually increase from low type to high type. High-type zircon has a high birefringence, […]
