6.52 carats Fancy Vivid Yellow Diamond and Diamond Ring. Estimate 2,400,000 — 3,000,000 HKD (270,379  - 337,974 EUR). Photo Sotheby's

Centring on an oval fancy vivid yellow diamond weighing 6.52 carats, surrounded by circular-cut diamonds extending to the shoulders, mounted in platinum and 18 karat yellow gold, signed Ronald Abram. Ring size: 5½

Accompanied by GIA report numbered 16436719, dated 9 November 2007, stating that the 6.52 carat diamond is natural, Fancy Vivid Yellow colour, VVS2 clarity. 

Sotheby's. Magnificent Jewels & Jadeite, Hong Kong, 06 avr. 2015, 01:00 PM