With the help of magnifying glass, المجهر والأدوات الأخرى, the magnification inspection of colored gemstones is mainly to observe the internal and external characteristics of the jewels and jade. Internal features include: الادراج, بناء, نَسِيج, عصابات اللون, stains, إلخ.; external features include: original crystal planes, خدوش سطحية, ports, and open slit lamps. فحص التكبير […]
