- Online Jewelry Appraisal Center
 - Offers an online do-it-yourself jewellery valuation system designed by a gemologist and valuer. - Harold Weinstein Ltd.
- Gemological laboratory specialising in fine jewellery insurance, estate appraisals, and diamond grading.
- Karen Jensen Gem & Jewelry Appraisals
- For buying, selling, or insuring.
- Global Gemological Laboratory
- Provides diamond grading reports and appraisals.
- Richard Tilles, Inc.
- Appraises and buys estate jewellery and gemstones.
- Geolat & Associates, Inc.
- Offers jewellery, fine art, and estate appraisals.
- Gemological Institute of the Rockies
- Buying, selling, certifying, and mounting diamonds and Montana sapphires.
- Jewelry Judge
- Offers a computerized appraisal system for gemologists.
- Appraisal Referrals
- Specialises in property, gems and jewellery, business valuation, and machinery and equipment.
- Dupuis Jewelry Auctioneers
- Provides appraisals and auction services for estates, individuals, and institutions.
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