A Mystery-Set Sapphire and Diamond Earrings by Van Cleef & Arpels Each designed as a mystery-set sapphire bombé hoop with round-cut diamond borders on the sides, mounted in platinum and 18k white gold. Signed and with maker's mark for Van Cleef & Arpels, New York Sales results for similar ear clips: Christies, Sale 2613, Jewels: The Hong Kong Sale, 28 May 2008, price realized $70,474 (including buyer's premium) Sotheby's, Sale GE0603, Magnificent Jewels: Geneva, 18 May 2006, price realized $37,485 (including buyer's premium)