With the help of magnifying glass, microscope and other instruments, the magnification inspection of colored gemstones is mainly to observe the internal and external characteristics of the jewels and jade. Internal features include: การรวมเข้าด้วยกัน, โครงสร้าง, พื้นผิว, color bands, คราบ, เป็นต้น; external features include: original crystal planes, surface scratches, ports, and open slit lamps. Magnification inspection […]
