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 conventional gem identification. 拡大検査を通じて, インクルージョンなどの重要な情報, texture and structure in jewels and jade can be found. This information can help us identify the types of gems, determine the synthesis and treatment of gems, and determine The origin and source of the gems, and the evaluation of the quality level of the gems.
Stone inclusions are an important concept in gemology, including inclusions in gems, color distribution characteristics, twin crystals and fractures, cleavage and fissures. Gemstone inclusions can not only provide a basis for gem identification and the origin of the gem, but also increase the beauty of the gem. If a natural crystal inclusion is found in the gemstone, it is found that the gemstone is natural. If there are inclusions with origin meaning in the gem, the origin of the gem can be determined. By observing the number of internal inclusions, 切断, and the degree of crack development, the clarity of diamonds and other jewels can be graded and evaluated.
The commonly used instruments for magnification inspection are magnifying glass and microscope. For industry inspectors, proficient use of magnifiers is essential. The 10x magnifying glass commonly used in gem identification is a triple combination lens, which consists of a convex lens and two concave lenses. The microscope can magnify higher magnification, and can use its own illumination system to observe many features of gems that cannot be observed with a magnifying glass.
Magnifying glass is used in the identification of diamonds and colored gemstones in the identification of jewelry, while the identification of precious metals is generally not used.