Z. Boyadjian is the president of Gemological Services of Beverly Hills. He has over 35 years experience appraising fine jewelry from different eras like Edwardian, Art Nouveau, Art Deco, to Contemporary.  He is a Graduate Gemologist (G.G.) from Gemological Institute of America (GIA). Z had been a consultant to several Fortune 500 companies, such as Deloitte & Touche and was a well respected speaker to GIA students and alumni, and jewelry professionals.

From the ruby mines of upper Burma to the Australian outback, from the Brazilian hinterland to the black pearl farms of Tahiti, from Tanzania’s Umba River to the emerald mines of Colombia, Z’s search for rare and beautiful gemstones has taken him to the world most important gem producing areas. 


Z has become a world-renowned international diamond and gem trader with over 35 years of experience. As one of the world’s leading sellers of fine jewelry, he is known as the go-to-guy for diamonds and colored stones, estate and rare pieces of jewelry, and investment advice. 


Z is a popular lecturer and has spoken widely on gemstone topics before both industry and consumer groups. He is a frequent guest lecturer at his alma mater G.I.A. and just recently was a featured speaker at the 2019 Hong Kong International Jewelry Show.



An investment in fine jewelry is an important event. You want to be assured that your purchase is safe. That’s why we make appraisals for insurance replacement purposes. ...
Jewelry & Diamond Appraisal
15 min
Over time, many people accumulate significant collections of jewelry that they have bought, inherited or been given as gifts. No matter how much you enjoy your jewelry, i...
Sell Your Jewelry
15 min
There is one area however, that first time jewelry buyers often overlook—having a pre-purchase or post-purchase evaluation. Since the advent of the Internet, people have ...
Consulting & Pre-Purchase Evaluation
30 min
Starts at $100/item

433 N. Camden Dr. #600
Beverly Hills, CA 90210


Tel: 310-424-5744


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