This Extremely Rare 10-Carat Blue Diamond Could Fetch $20 Million at Auction
The extremely rare, 10-carat Mediterranean Blue diamond could fetch a whopping $20 million at Sotheby's High Jewelry auction ...
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Expert tips on how to spot real diamonds from fakes
Blacklight: Hold the diamond under a black light (a lamp that emits ultraviolet light, which is invisible to the human eye. If the jewel emits a blue light, it's likely real. “The black light ...