With the help of magnifying glass, микроскоп и други инструменти, the magnification inspection of colored gemstones is mainly to observe the internal and external characteristics of the jewels and jade. Internal features include: включвания, структура, текстура, цветни ленти, петна, и т.н.; external features include: original crystal planes, повърхностни драскотини, ports, and open slit lamps. Проверка на увеличението […]
