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Pair of 18 Karat Gold, Platinum, Mystery-Set Ruby and Diamond Leaf Earclips, Van Cleef & Arpels, France, 1966. photo Sotheby's

The leaves mystery-set with calibré-cut rubies, the central stem set with baguette diamonds, signed Van Cleef & Arpels, numbered 17606, workshop mark, French assay marks. Est. 60,000—80,000 USD. Lot Sold 170,500 USD

PROVENANCE: The Magnificent Jewels of Mme. Helene Beaumont, Sotheby's Geneva, May 18, 1994, lot 504.

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Platinum, 18 Karat Gold, Ruby and Diamond Ring. photo Sotheby's

The cushion-shaped ruby weighing 7.44 carats, flanked by tapered baguette diamonds weighing approximately 0.50 carat, size 6½.. Est. 100,000—150,000 USD. Lot Sold 152,500 USD

NOTE: Accompanied by AGL report no. CS 43070 stating that the ruby is of Burmese origin, enhancement: heat.

01

18 Karat Gold and Star Ruby Ring, Cartier. photo Sotheby's

The cabochon star ruby weighing 16.16 carats, size 7¼, signed Cartier, numbered 89265. With signed box. Est. 20,000—30,000 USD. Lot Sold 110,500 USD

NOTE: In a 1974 letter written to Mr. Dietrich, Kenneth L. Van Atten, then Executive Vice President of Cartier, states 'The natural star ruby in which you are interested weighs 16.16 carats and the lovely color and clear star make it a stone of rare beauty. The ruby was originally sold by Cartier in the 1920s to Mr. E. H. Augustus. Recently it was re-purchased by us from this important estate along with various other items of jewelry. Gem quality rubies have always been scarce but since World War II they have become even more so, adding extra value and prestige to the one who can count such a ruby among his possessions. I am of the opinion that the star ruby is a Burma ruby.'

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Platinum, Ruby and Diamond Ring, Oscar Heyman & Brothers, Circa 1950. photo Sotheby's

Set with a cushion-shaped ruby weighing approximately 4.25 carats, partially bordered by alternately-set baguette diamonds and tapered baguette rubies, further enhanced by pavé-set diamonds, the total diamond weight approximately 1.40 carats, size 4½, numbered 32871. Est. 80,000—120,000 USD. Lot Sold 92,500 USD

NOTE: Accompanied by AGL report no. CS 43071 stating that the ruby is of Burmese origin, heat enhancement: none.

1g

Pair of 18 Karat Gold, Invisibly-Set Ruby and Diamond Flower Earclips, Aletto Brothers. photo Sotheby's

The three-dimensional flowerheads invisibly-set with calibré-cut rubies, the center set en tremblant with round diamonds weighing approximately 3.00 carats, signed Aletto Bros. With signed box. Est. 50,000—75,000 USD. Lot Sold  80,500 USD

011

18 Karat Gold, Star Ruby and Diamond Ring, Cartier. photo Sotheby's

Bezel-set with a cabochon star ruby weighing approximately 6.00 carats, flanked by round diamonds weighing approximately 1.50 carats, size 6¾, signed Cartier. With signed box. Est. 15,000—20,000 USD. Lot Sold 68,500 USD

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Platinum, Ruby and Diamond Necklace-Bracelet Combination, Oscar Heyman & Brothers. photo Sotheby's

The slightly graduated necklace set with cabochon rubies weighing approximately 60.00 carats, alternating with round diamonds weighing approximately 3.00 carats, length of necklace 14 7/8 inches, detaches into two bracelets, lengths 7½ and 7 3/8 inches, maker's mark for Oscar Heyman & Brothers, numbered 49261. Est. 30,000—40,000 USD. Lot Sold 60,000 USD

010

18 Karat Gold, Ruby and Emerald Brooch, Schlumberger for Tiffany & Co., France. photo Sotheby's

Designed as a stylized chestnut, pavé-set with round rubies and emeralds, signed Schlumberger, Tiffany & Co., French assay marks. Est; 5,000—7,000 USD. Lot Sold 10,625 USD

09

18 Karat Gold, Ruby, Emerald and Diamond Fish Brooch, Dessin, Paris. photo Sotheby's

The body set with round rubies and emeralds, the head and tail enhanced with round diamonds and completed by round sapphire eyes, mounted in 18 karat white and yellow gold, signed Dessin, Paris. Est. 4,000—6,000 USD. Lot Sold 10,625 USD

02

18 Karat Gold, Mabé Pearl, Ruby and Diamond Brooch, Schlumberger for Tiffany & Co.. photo Sotheby's

Of sunburst design set in the center with a mabé pearl, accented by round diamonds weighing approximately .95 carat, and numerous round rubies, signed Tiffany, Schlumberger. Est. 6,000—8,000 USD. Lot Sold 8,125 USD

Sotheby's. Jewels from the Estate of William B. Dietrich Sold to Benefit the William B. Dietrich Foundation, 09 Dec 10, New York www.sothebys.com