National Association of Jewelry Appraisers (NAJA)

National Association of Jewelry Appraisers (NAJA) was founded in 1981 on the premise that the specialized field of gem and jewelry appraising was an area that was long overdue for representation on a professional basis. The Association's primary purpose is to recognize, and make available, the services of highly qualified, informed, experienced, independent, and professional appraisers of gems and jewelry to those members of the public requiring such expertise. In addition, NAJA seeks to promote the trademark and professional designations earned by our members and to make available continuing educational materials in order to ensure that they are among the best informed appraisers in our industry.

Accredited Gemologists Association

The Accredited Gemologists Association is an independent, international nonprofit organization dedicated to the following practices.

  • Gemological Education
  • Research
  • Identification & Evaluation of Gem Materials
  • Development of Professional Standards of Analysis, Practice & Ethics

Gemological Institute of America - A Tradition of Science and Education

Established in 1931, GIA is the world’s largest and most respected nonprofit institute of gemological research and learning.

Conceived 75 years ago in the august tradition of Europe’s most venerated institutes, GIA discovers (through GIA Research), imparts (through GIA Education), and applies (through the GIA Gem Laboratory and GIA Gem Instruments) gemological knowledge to ensure the public trust in gems and jewelry.

With 1,100 employees, the Institute’s scientists, diamond graders, and educators are regarded, collectively, as the world's foremost authority in gemology. 


Pricescope is a Consumer advocate site dedicated to consumer education about diamonds and diamond prices, loose diamonds and wholesale diamonds.

Jewelers Mutual

Personal Jewelry Insurance through Jewelers Mutual Insurance Company

Once you've chosen a beautiful piece of jewelry, your next decision should be how you will insure it against loss, damage, and theft. The Personal Jewelry Insurance program from Jewelers Mutual Insurance Company offers comprehensive coverage at affordable prices! They have specialized in insuring jewelry and jewelry businesses since 1913.

Visit Jewelers Mutual's Web site at or stop by our store for a brochure and application. If you have any questions about the insurance coverage or how to obtain Personal Jewelry Insurance, contact a customer service representative, toll free, at (888) 884-2424.

Pala Gems

Pala International is a specialist in wholesale sales of gems, jewelry, and mineral specimens. Visit for an online catalog, gem and gemology news, in-depth articles, and gemstone buying guides.

Jewellery Appraisers of the World We are featured on Jewellery Appraisers of the World. You can read/leave reviews on my Los Altos Jewelry Appraiser page.