|Gemmological Association & Gem Testing Laboratory
of Great Britian:
27 Greyville Street
Mutual company for the benefit of members. The CIBJO registered lab for the UK.
Diamond grading, verbal assessment for color and clarity, repolishing diagrams, colored
diamond determination, pearl identification, gem identification, educational courses.
Weight, color, clarity, shape and cutting style, measurements, proportions
(height percentage and table percentage), polish, symmetry, girdle, UV-fluorescence,
Description and result. Country of origin and heat treatment opinions place under coments.
PGA diploma courses, DGA diploma course