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Gemological Laboratories
Central Coast Gemological Laboratory
Services include cutting, appraisal, classes and gem sales.
http://www.centralcoastgemlab.com/
European Gemological
Provides diamond, colored stone and pearls certification, analysis and consultations.
http://www.eglusa.com/
European Gemological Laboratory
European Gemological Laboratory's is and international.
http://www.egl.co.za/
Gemological Institute of America
The world’s largest and most respected nonprofit institute of gemological research and learning.
http://www.gia.edu
GemWorld
Provide opals, gemstones, collector stones, synthetics, cabbing and faceting rough, lapidary equipment and supplies.
http://www.gemworld.com/
Global Gemological Laboratory
Diamond grading reports and appraisals.
http://www.globalgemlab.com/
Harold Weinstein Ltd.
Gemological laboratory specializing in fine jewelry insurance, estate appraisals, and diamond grading.
http://www.hwgem.com/
International Gemological Institute
The world's largest independent gem certification and appraisal institute and is renowned for its quality services, extensive experience and know-how.
http://www.igi-usa.com/
Kashmir Sapphires
A network of gemologists, private collectors, and international financiers for the buying and selling of kashmir and burmese sapphires.
http://www.kashmir-sapphires.com/
Kim Jewels
Specializing in customizable sterling silver and gemstone jewelry at affordable prices.
http://www.kimsjewels.com/