With the help of magnifying glass, Mikroskop und andere Instrumente, the magnification inspection of colored gemstones is mainly to observe the internal and external characteristics of the jewels and jade. Internal features include: Einschlüsse, Struktur, Textur, Farbbänder, Flecken, usw.; external features include: original crystal planes, Oberflächenkratzer, ports, and open slit lamps. Vergrößerungsprüfung […]
