An amethyst & diamond brooch

REF: 3381

Having a central oval amethyst set in reverse with a polished cabochon uppermost and a faceted back. This 'backwards' effect allows light to reflect off the back facets through the smooth cabochon surface. The central stone is mounted in an ornate diamond frame.

Overall size is approx 42mm x 22mm
Amethyst size is approx 20mm x 13.5mm with depth of 8.71mm
Weight of Amethyst is approx 12ct - 13ct.

Mounted in platinum.
French, circa 1910.