People usually call the inclusions in gems “impurities.” Karena itu, the inclusions in gems are also a factor in evaluating the quality of gems; Misalnya, in the quality evaluation of diamonds, an important criterion is “kejelasan”, yaitu, the cleanliness of the interior of the gem.
Secara umum, the less impurities in the gem, semakin baik. It must be observed in detail with a 10x magnifying glass under strong lighting conditions, and no inclusions can be seen. This is the best product. But things are divided into two. In a few cases, inclusions can also increase the value of the gem. It can be seen that ruby contains a large number of directionally arranged fine rutile needle-like crystals. When polished into a hemispherical body stone, it will produce a brilliant cat’s eye or starlight effect. This increases the preciousness of gems.
5. Helps infer the origin of the gem
When the same kind of gemstone is formed in different places of origin, it may contain inclusions, which becomes the basis for using the inclusions of the gemstone to estimate the place of origin of the gemstone. Misalnya, emeralds produced in Colombia often contain characteristic three-phase inclusions; emeralds produced in India contain comma-like inclusions; emeralds produced in Russia contain fibrous inclusions.
The research method of the inclusions in gemstones is generally to inspect the inclusions in gemstones by magnifying observation. The most conventional instrument is a gem magnifying glass or gem microscope. Through the gem microscope, you can observe the small inclusions, retak, color bands and the surface characteristics of the gem.
Selain itu, in some cases, it is necessary to resort to some large-scale analytical instruments, such as electron microscope, electron probe, infrared spectrometer, Raman spectrometer, dll..
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