The most well known gemological laboratories are listed below and all of them are equipped to test alexandrite. Most gemological laboratories only identify gemstones, they do not appraise them.
The National Association of Jewelry Appraisers is the only appraisal association in the United States that devotes itself solely to the appraisal of gems, jewelry, silver flatware and hollowware.
The International Society of Appraisers (ISA) was formed in 1979 as a for-profit corporation focused on the education and professionalism of personal property appraisers. It became a non-profit corporation in 1994, and remains dedicated to enhancing the p
Gemworld International, Inc. is primarily engaged in publishing for the jewelry industry. Their premier publication, The GemGuide, made its debut in 1982. The GemGuide Appraisal Software, which utilizes The GemGuide pricing, has been continually improved
The society originated in 1936 and incorporated in 1952. ASA is headquartered in the metropolitan Washington, D.C., area. It is one of eight major appraisal societies that, in 1987, founded The Appraisal Foundation, a national nonprofit organization creat
Established in 1987, Hong Kong Gems Laboratory is well equipped and recognized by gemologists and industry professionals. Full-service lab offers FTIR spectrophotometerservice, which provides evidence for jadeite jade and diamond, corundum, emerald and ot