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Platinum, Opal, Rock Crystal and Diamond Necklace, Tiffany & Co., retailed by Bailey, Banks & Biddle, first half 20th Century. photo Sotheby's

The graduated single-strand composed of opal beads measuring approximately 13.6 to 6.2 mm., spaced by faceted rock crystal rondelles measuring approximately 7.5 to 3.9 mm., the clasp set with old European-cut diamonds weighing approximately .15 carat, length 19 inches, partially obscured signature for Tiffany & Co., signed BBB, numbered 91546. Estimate 20,000—30,000 USD. Lot Sold 62,500 USD

NOTE: Accompanied by a copy of the appraisal issued by Bailey, Banks & Biddle in 1950.

Sotheby's. Important Jewels, 02 Feb 11, New York www.sothebys.com