Platinum, Natural Gray Pearl and Diamond Brooch - photo Sotheby's

The button-shaped natural gray pearl measuring approximately 21.2 by 21.1 by 12.0 mm, framed by eight old European and old mine-cut diamonds weighing approximately 7.45 carats, alternating with eight marquise-shaped diamonds weighing approximately 3.60 carats, further accented by 16 small round diamonds weighing approximately 3.20 carats; fitted with a pendant loop. Estimation: 400,000 - 600,000 USD

Accompanied by two gemological reports:
GIA report no. 2145591266 stating that the pearl is natural, saltwater.
SSEF report no. 63357 stating that the pearl is natural, saltwater.Together with a letter from the SSEF stating that thepearl is "rare and exceptional" and "merits special attention and appreciation."

Sotheby's. Magnificent Jewels from the Collection of Mrs. Charles Wrightsman. New York | 05 déc. 2012 www.sothebys.com