6 avril 2016
A sapphire and diamond ring, Black Starr & Frost
Lot 32. A 3.49 carats sapphire and diamond ring, Black Starr & Frost. Estimate US$ 250,000 - 350,000 ( €220,000 - 310,000). Photo: Bonhams. centering an antique cushion brilliant-cut sapphire, weighing 3.49 carats, within a diamond-set ornate basket and...