Universal Gemological Services (UGS), an independent affiliate of EGL USA, provides appraisals for loose polished diamonds, colored diamonds, colored gemstones, and pearls, as well as most jewelry.


UGS staff includes skilled market analysts and certified members of the National Association of Jewelry Appraisers (NAJA) who work with gemologists, color specialists, clarity experts, and cutting-edge researchers.

The team members objectively assess quality, origin, material, workmanship, and condition of each stone or jewelry item. Then, they consider current economic trends to assign an approximate value that is appropriate to the purpose of the appraisal and in full compliance with the standards of NAJA and the Uniform Standards of Professional Appraisal Practice (USPAP).


UGS offers a variety of comprehensive reports, including data such as a description of each piece, its analysis and attributes, digital photo, diagram(s), archival documentation, and a formal report approximating its designated fair market value.

Each report is completely objective — free of any conflict of interest with wholesalers, retailers, or auction houses.

Report sizes include:

Full Reports

  • Comprehensive findings with supporting diagrams and/or photos, on full-size laminated sheets (typically 8.5” x 11”).
  • These are packaged in silver UGS card-stock folders and clear plastic sleeves.

  • View a UGS Appraisal Report

Mini Reports

  • Key findings, often with basic diagrams and/or photos, on compact, laminated cards.
  • These are designed in a range of sizes ideal for retail use:

Appraisal Summary — 3.25” x 5”, a small report in a silver UGS card-stock folder. As an exclusive bonus, free UGS Appraisal Summaries accompany all full-size EGL USA Diamond, Hearts & Arrows Diamond, and Cut Grade Diamond Reports issued for loose stones.

View a UGS Appraisal Summary

Micro Appraisal Report — 3.125” x 3.125”, to fit a standard jewelry box.

Appraisal ID Card — 3.25” x 2”, a credit-card size.

Appraisal Gem Tag — 2” x 1”, to fit a loose stone or ring display tray.


From start to finish, client property and information are protected. Stones and jewelry are kept in a secure insured facility. And final documents include a variety of intricate security measures to ensure their authenticity.


Report work typically begins with a complimentary scheduled short meeting, for a preliminary review of the stone or jewelry. However, clients can also choose shipped, hand-delivered, and, in some cases, appointment-based services.

Appraisal pricing is available in the EGL USA Price Schedule.

To schedule an initial consultation, submit an item for appraisal, or for additional information, contact UGS customer service at 888 EGL USA4 (888 345 8724) or

Please note: UGS reports are subject to report terms & conditions.