A vintage 18K yellow gold clip earrings by Tiffany and Co. in collaboration with Schlumberger Studios. Hoop earrings with rope design. Marked Tiffany and Co., Schlumberger Studios, Au 750 on the inner side. Weight: 19 grams. The earrings come in original box. Jean Schlumberger, 1907 to 1987, was a French jewelry designer well known for his work at Tiffany. Collectible Luxury Jewelry For Women.