Designed specifically for industry professionals, the masterclass focused on practical and market-relevant gemological ...
GCAL By Sarine's proprietary; radically rigorous 8X Ultimate Diamond Cut Grading standards assess round, marquise, pear, princess, oval and radiant cut diamonds. According to Avi Levy, New York-based ...
Synthetic gem-crystals are available since the late 1800s and their production processes were more and more refined. Later, starting in the 1950s, diamond was available via different types of ...
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