A diamond and gem-set spray brooch, circa 1840. Estimate £3,000 - 4,000 (€4,100 - 5,500). Photo Bonhams.

The bouquet of stylised cushion-shaped and rose-cut diamond peonies, with cushion-shaped ruby anthers, the stems decorated with rock crystal leaves and buds in pink and green foiled closed-back settings, tied with a rose-cut diamond bow, cushion-shaped diamonds approx. 5.25cts total, French assay mark, length 8.2cm

Note: A similar example can be seen at the V&A Museum, reference M.83-1951. 

Bonhams. JEWELLERY, 9 Sep 2015 11:00 BST - LONDON, KNIGHTSBRIDGE