David Rotenberg, ECGA
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David Rotenberg is an Emeritus Certified Gemologist® Appraiser specializing in fine jewelry and gems, with a strong commitment to continued education in the Gemology and Appraisal fields.

Mr. Rotenberg has more than 40 years of experience in the jewelry industry, providing appraisals for estate fair market value settlements, estate liquidations, insurance claims, and expert witness testimony. He operates an American Gem Society (AGS) fully-accredited Gem Laboratory on-site to provide the most comprehensive, accurate and professional jewelry appraisal services available.


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Mission Statement

The American Gem Society (AGS) is a nonprofit trade association of fine jewelry professionals dedicated to setting, maintaining and promoting the highest standards of ethical conduct and professional behavior through education, accreditation, recertification of its membership, gemological standards, and gemological research.

The Society is committed to providing educational products to inform and protect the consumer and to contributing to the betterment of the trade by creating industry standards to protect the jewelry-buying public and the fine jewelry industry as a whole.

AGS Laboratories, founded to support the AGS mission, is a nonprofit diamond grading laboratory with a mission of consumer protection. Adhering to the AGS Diamond Grading Standards, AGS Laboratories is dedicated to offering diamond grading reports that provide consistency and accuracy based on science.

American Gem Society

8881 W. Sahara Ave. Las Vegas, NV 89117

info@ags.org (866) 805-6500