American Gem Provides diamond grading services featuring grading of the diamond cut.
Asian Institute of Gemological Sciences The AIGS Gemstone Identification, Grading and Research Laboratory was the first professional gemological laboratory to be established in Asia in 1978.
European Gemological Provides diamond, colored stone and pearls certification, analysis and consultations.
GemLab Specializes in origin of color determination for fancy colored diamonds using Raman spectrometer.
GemResearch Determination of the authenticity and country of origin of a rubies and sapphires.
Global Gemological Offers mini and full diamond grading reports and appraisals for the trade.
