Gold, amethyst, enamel and glass brooch and clasp, René Lalique, circa 1900. 

The brooch set in the center with a French-cut rectangular-shaped amethyst, within a frame of pink, cream and white enamelled branches, accented by clusters of iridescent glass raspberries, the reverse of repoussé mirrored gold pattern, unsigned, pin fitting later added; the clasp set in the center with a sugarloaf cabochon amethyst, with a frame of pink, cream and white enamelled branches, the reverse of repoussé mirrored gold pattern, signed Lalique. ESTIMATE 60,000-80,000 USD

NOTE: For an example of the raspberry theme in Lalique's ouevre, see The Jewellery of René Lalique, by Vivienne Becker, A Goldsmiths Company Exhibition, 28 May to 24 July, 1987, p. 79, no. 56.
Also cf. René Lalique: Schmuck und Objets d'art 1890-1910, by Sigrid Barten, catalogue nos. 290, 290A, 299, 344, 406, 688, 1152, 1153, 1265, 1429, 1656 and 1807.

Sotheby's. Important Jewels, New York | 09 Feb 2012 www.sothebys.com