A 19th Century pearl and diamond bow brooch

A 19th Century pearl and diamond bow brooch, the silver and gold bow set with rose cut diamonds and centred with a button shaped pearl. Suspending a cushion shaped diamond and larger pearl. The lower pearl accompanied with certificate number 04828 from The Gem and Pearl Laboratory dated 11th November 2011 stating that the irregular drop shaped pearl measures 9.4 - 10.9mm x 15-16mm, weighs 3.27g (total) and is a natural saltwater pearl.