Lot 129. Exceptional Ceylon sapphire of 39.19 carats and diamond brooch, Cartier. Estimate CHF 500,000 - CHF 700,000 (USD 500,000 - USD 700,000). Price realised CHF 1,995,000. © Christie's Images Ltd 2019.

Octagonal step-cut sapphire of 39.19 carats, rectangular and circular-cut diamonds, platinum and gold (French marks), 3.0 cm, maker's mark.

AGL, 2019, report no. 1102270: 39.19 carats, Ceylon, no indications of heating, no clarity enhancement, royal blue, Appendix letter
Gübelin, 2019, report no. 19050150: 39.19 carats, no indications of heating, royal blue, Appendix letter
SSEF, 2019, report no. 106791: 39.194 carats, Ceylon, no indications of heating, royal blue, Appendix letter 

Christie's. Magnificent Jewels, Geneva, 12 November 2019