Lot 443. Smoky quartz, yellow sapphire and citrine brooch, Suzanne Belperron, circa 1935Estimate 30,000 — 49,000 CHF. Lot Sold 93,750 CHF. Photo Sotheby's

Collet-set with variously shaped yellow sapphires and citrines to a fluted smoky quartz jewel, French assay mark and maker's mark for Groëné & Darde.

Accompanied by a certificate from Olivier Baroin. 

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 11 nov. 2015, 10:00 AM