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 ...
Identifying gemstones is not a trivial task. While properties such as color and transparency can help with identification, gemstones such as rubies, spinels, and garnets can be difficult to ...
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