28 octobre 2013
Sapphire and diamond ring, Ronald Abram
Sapphire and diamond ring, Ronald Abram. Photo Sotheby's. Claw-set with a cushion-shaped sapphire weighing 4.52 carats, between heart-shaped diamond shoulders, size 491/2, signed Ronald Abram. Estimate: 140,000 – 185,000 CHF Accompanied by SSEF report...