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 ...
Today, we held an HGA Gem Identification Seminar in Kannai, Yokohama.In this seminar, we used approximately 150 gemstones as ...
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