About Us

18 Karat Appraisers has conducted business in Beverly Hills for over 30 years and are a well known family business with a remarkable reputation due to our long history and wealth of experience. Our expertise in gemology, contemporary, antique and estate jewelry have allowed us to acquire an exquisite collection of antique and estate jewelry pieces over the years. Everyday contact with international wholesalers and jewelry designers, as well as our certification as certified jewelry appraisers, allows 18 Karat Appraisers to serve our clients with unmatched knowledge to better evaluate your jewelry for the purpose of either appraisal or sale.

18 Karat Appraisers’ reputation for accuracy and honesty enables them to earn referrals from many jewelry stores in the Los Angeles area. Currently, 18 Karat Appraisers supplies a number of independent jewelry stores and renowned department stores across the nation with one of a kind, antique and estate jewelry. We also provide services and assistance to our Hollywood celebrity and international clientele.


Oscar Golbert


Oscar Golbert is the founder of 18 Karat Appraisers and a Graduate Gemologist, graduating from the Gemological Institute of America, (G.I.A.), in 1992 at the Santa Monica, CA location and is a member of the Gemological Institute of America Alumni Association (Diploma Member). Oscar Golbert is also an Accredited Member of the International Society of Appraisers (I.S.A.) since 1993. He was the former director of a well known, French retail jewelry store on Rodeo Drive for over 10 years which gives him unmatched knowledge of national and international jewelry markets. Oscar has studied the antique and estate jewelry market and watches extensively as well.


Hernan Golbert


Hernan Golbert is a Graduate Gemologist graduating from G.I.A. in 2005 at the Culver City, CA location. Hernan received his bachelor’s degree from the University of California, Santa Barbara in 2005 in Political Science and History and became a part of the company shortly thereafter to work with his father.  Hernan is a Certified Member of National Association of Jewelry Appraisers (NAJA), also a candidate member of American Society of Appraisers (ASA), and is the head certified jewelry appraiser at the company.