Magnification inspection refers to the observation of internal features such as inclusions, 構造, テクスチャ, カラーバンド, and stains of jewellery and jade, as well as external features such as original crystal planes, 表面の傷, fractures, and open fissures, with the help of magnifying glass, 顕微鏡およびその他の機器. Magnification inspection is an important method in […]
