Lot 75. 18-karat gold, amethyst and lapis lazuli brooch, Tiffany & Co., Designed by Louis Comfort Tiffany, circa 1914–1920. Estimate $10,000–15,000. Photo: Sotheby's.

Centering a cabochon amethyst within a gold wirework mounting accented by gold leaves and clusters of lapis lazuli beads, gross weight approximately 9 dwts, signed Tiffany & Co.; circa 1914-1920.

Exhibited: Shelburne Museum, Natural Beauties: Jewelry From Art Nouveau to Now, Shelburne, Vermont, 15 November 2014 - 8 March 2015.

Literature: Illustrated in Tiffany Colored Gems by John Loring, pages 58-59.

Illustrated in Louis Comfort Tiffany at Tiffany & Co. by John Loring, page 69.

Sotheby's. Magnificent Jewels Including the Legendary Stotesbury Emerald, New York, 25 Apr 2017, 10:00 AM