Gem appraisal process: When a gem is sent to the appraisal office, it usually needs to be weighed, measured and recorded. After simple instrument determination, it will be put on an infrared spectrometer, referred to as FTIR. What does this FTIR do? It can identify what kind each gem is, and each gem has a unique map.
The spectrum measured by FTIR can easily distinguish the gemstone species that are easily confused. Such as rubies and spinels. FTIR can also be used to test whether rubies and sapphires are burned at low temperature in some cases, and the origin of the gems.
Other gemstone appraisal certificates:
IGAC (International Jewelry Appraisal Center) was established in 1963, located in California, USA, and is the authoritative research institution of diamonds, colored gems, pearls and cultivated gems in the world.
IGAC is a non-profit public welfare organization, which is the main source of knowledge, standards and education on gems and jewelry. The IGAC report represents a high standard of reliability, consistency and integrity. Now, IGAC report checking can be used for all IGAC reports, providing users with additional assurance.
GRS GRS (Swiss Gemological Research and Appraisal Institute) is a gemological appraisal institution founded by Swiss gemologist Dr. A. Peretti. Can independently issue test reports. Mainly used to detect the world's major gems, such as rubies, sapphires, emeralds, golden green cat's eyes and so on. In addition to Switzerland, GRS has offices in Sri Lanka, Thailand, China and Hongkong. Accept the gem appraisal.
SSEF (Affiliated Appraisal Institute of Swiss Gemological Institute) Swiss Jewellery Research Institute, full name SSEF. It is one of the most reliable appraisal institutions of international mainstream auction houses, such as Christie's, Sotheby's and Baolong. , and it is common in high-end gems with collection value.