A French circular brooch

A French circular brooch, set with diamonds and rubies. The centre old circular cut diamond weighs approximately 1.30cts and is millegrain set within a surround of calibre cut rubies. Within a swirling open work section of rose cut diamonds (some missing) and a border of larger calibre cut rubies in platinum and yellow gold. French control marks. 3cm wide. Case by S.J. Phillips.