19.39 carats Burmese sapphire and diamond ring, Cartier, circa 1925. Estimate 295,000 — 485,000 CHF (278,302 - 457,548 EUR). Photo  Sotheby's.

law-set with a cushion-shaped sapphire weighing 19.39 carats, between baguette diamond shoulders, size 54, signed Cartier, numbered, French assay mark.

Accompanied by SSEF report no. 79272, stating that the sapphire is of Burmese origin, with no indications of heating; together with Gübelin report no. 8811026, dated 10 November 1988, stating that the sapphire is of Burmese origin.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 12 mai 2015, 10:30 AM