The common colors of zircon are colorless, สีฟ้า, สีเหลือง, สีเขียว, สีน้ำตาล, สีแดง, and purple. According to the degree of crystallinity, zircon can be divided into three varieties: high type, medium type and low type. The refractive index, density, and hardness value gradually increase from low type to high type. High-type zircon has a high birefringence, […]
