Circa 1980s, 18k and Platinum, by Jean Schlumberger for Tiffany & Co., New York. Long associated with high luxury and classic fashion, Tiffany's Schlumberger collection is exquisitely tasteful. This "Rope Three Row with Diamonds" ring in 18k and platinum is delightful on its own or "tres chic" stacked with other bands. Size 4 1/4. Excellent condition. Stone Details: Tiffany diamonds are always very white and sparkly.