A 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exi...
Blue-green diamond called the "world's rarest" sells for record $17.3 million at auction
A 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exist sold for $17.3 million on Wednesday, Christie's said,...
Author: CBS News
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