Performs independent jewelry appraisals for the trade and the public. Serves Colorado Springs, Denver and Pueblo, Colorado. http://www.antonnash.com

Provides gemological identification services and professional replacement valuation reports. http://www.cgacompany.com/

Appraises diamonds, gemstones and jewelry for value, insurance, estates. Located on Long Island. http://www.gemevaluation.com/

Offers diamond grading reports and jewelry appraisals. Located in Toronto, Canada. http://www.gemscan.com/

Canadian independent gemological laboratory offering diamond grading, gem identification. http://www.hwgem.com/