The top lot of the auction was a Toi et Moi ring with a 5.03-carat pear-shaped diamond and a 3.61-carat fancy vivid yellow ...
3 个月
ZME Science on MSNWhat makes gemstones so brilliantly colored — spoiler alert, it’s physicsHeat and irradiation treatments can also enhance or alter the colors of topaz, making it one of the most versatile and widely ...
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