![]() ![]() ![]() Recently, a yellow sapphire from Chanthaburi, Thailand, showed a spectrum associated with “Punsiri” high-temperature heat treatment of blue sapphire. The material on the right, ranging from 0.41 to 1.40 ct, comes from the Khao Ploi Waen area of Chanthaburi, Thailand. The specimens on the left, weighing 0.22–0.41 ct, are from the Anakie area in Queensland, Australia. Ten of the 38 basalt-related yellow sapphires from this study. Comprehensive CAD/CAM For Jewelry Certificateįigure 1. ![]()
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