NEW YORK -- The world's most expensive diamond and ruby have been sold in the same auction -- a first in auction history. A 55-carat ruby sold for nearly $35 million at Sotheby's Magnificent Jewels ...
A blue diamond lived up to the hype at auction this week. The 5.7-carat fancy intense stone, mounted as part of a diamond ring, hammered down for $8.8 million during Christie’s Magnificent Jewels sale ...
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