Platinum, 18 Karat Rose Gold, 3.55 carats Fancy Light Blue Diamond and Diamond RingEstimate 475,000 — 525,000 USD. Photo: Sotheby's.

Centering a pear-shaped Fancy Light Blue diamond weighing 3.55 carats, framed by round diamonds of pink hue weighing approximately .25 carat, bordered by round near colorless diamonds weighing approximately .60 carat, size 6½.

Accompanied by GIA report no. 1162772232 stating that the diamond is Fancy Light Blue, Natural Color, VS2 clarity.

Please note the diamonds of pink hue have not been tested for natural origin of color.

Sotheby's. Important Jewels, New York, 24 Sep 2015