| AGS |
The American Gem Society, or AGS. This group is recognized by the jewelry industry as an authority for grading gemstones.
출처: www.worldjewels.net/_e/page/1015/Glossary.htm
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| AGS |
American Gemological studies whose purpose is to promote universally acceptable cutting grade standards.
출처: www.engagement-rings.link.ru.com/diamond-dictionar...
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