Lot 14. An Art Nouveau Ceylon yellow sapphire, citrine and enamel brooch, by René Lalique, circa 1905. Estimate CHF 70,000 - CHF 90,000 (USD 70,375 - USD 90,482). © Christies Images Ltd 2017 

Centering a cushion-shaped yellow sapphire within a veronica plant surround in yellow molten glass and brown enamel, to the circular and pear-shaped citrine drop, circa 1905, 9.0 cm, with French assay mark for gold Signed Lalique. 

Accompanied by report no. 92643 dated 7 June 2017 from the SSEF Swiss Gemmological Institute stating that the origin of the yellow sapphire is Ceylon (Sri Lanka), with no indications of heating.

Provenance: Michel Perinet

Literature: Lalique, Lalique par Lalique, Londres, Edipop, 1976, p. 43 for an illustration of this brooch

Christie's. Beyond Boundaries: Magnificent Jewels from a European Collection, 13 November 2017, Geneva