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Graduate Colored Stones (GCS) Graduate Pearls (GP) Applied Jewelry Professional (AJP) GIA also exists to educate the gem and jewelry industry and the general public through its publications and outreach efforts. Most notable of these efforts is the quarterly publication of the magazine Gems & Gemology, a respected journal in the field. The ...
IGI provides independent grading reports, colored stone reports, identification and appraisal reports, diamond authentication and attestations of origin, and laser inscription services. They also offers diamond and colored stone courses through IGI's Schools of Gemology. The IGI school was the first to offer the practical Rough Diamond course. [4]
Gem Testing Laboratory, Jaipur: This is a coloured gemstone centre in Jaipur. It grades and certifies all kinds of stones, its speciality is in coloured gemstones. Indian Gemological Institute, New Delhi: The Institute is located in New Delhi, IGI serves the gem testing and certification requirements of the industry in North India. [20] [21]
In 2017, SSEF became the first gem lab in the world to introduce radiocarbon age dating of pearls as a service to clients. [8] In 2020, SSEF and University of Zürich researchers unveiled a new methodology (published in the journal Scientific Reports [ 9 ] ) to extract DNA from precious coral samples and thereby identify the species of samples.
The DSEF-lab fulfills all requirements to a modern, international service-institute for the gemstone-market. It characterizes gemstones, analyses the naturality and possible artificial treatments, issues gemstone-certificates and it can do research on any aspect of gemology with a professionally equipped laboratory and a research network to ...
The number, size, color, relative location, orientation, and visibility of inclusions can all affect the relative clarity of a diamond. A clarity grade is assigned based on the overall appearance of the stone under ten times magnification, which is the standard magnification for loupes used in the gem world.
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Gem identification is basically a process of elimination. Gemstones of similar color undergo non-destructive optical testing until there is only one possible identity. Any single test is nearly always only indicative. For example: The specific gravity of ruby is 4.00, glass is 3.15–4.20, and cubic zirconia is 5.6–5.9 . So one can easily ...