Lot 187. A superb 13.61 carats Type IIa oval-shaped brilliant-cut diamond ring. Estimate US$ 1,400,000 - 1,800,000 (€1,200,000 - 1,500,000). Photo: Bonhams.

centering an oval-shaped brilliant-cut diamond, weighing 13.61 carats, within a raised basket adorned with round brilliant-cut diamonds, to a split shank with similarly cut diamond accents; mounted in platinum; size 5 3/4

Accompanied by GIA report # 2155517190, dated October 30, 2015, stating the diamond as: D color, Internally Flawless clarity.

Accompanied by GIA type classification letter for GIA grading report # 2155517190, dated October 30, 2015, stating the diamond as: Type IIa.

Bonhams. FINE JEWELLERY, 4 Dec 2017, 15:00 EST, NEW YORK