In the 1930s, Suzanne Belperron turned Deco on its head and carved chalcedony into a wearable classic. Several prime examples are going to final (live) sale at Sotheby’s NY today. Here’s one case I got to plunder Friday. Among the treasures by Belperron: a pair of clip brooches, c. 1935, with carved blue chalcedony leaves and sapphires and a “Grappe de Raisin” clip-brooch made about a decade later with abalone grapes and carved chalcedony leaves. UPDATE: Chalcedony clips sold for $95,000 and aba