A large Gilson emerald and diamond brooch / pendant, 18ct yellow gold and platinum, crafted as a large convertible brooch pendant, featuring a central cluster of Gilson emerald crystals, deep green in colour, staggered in heights, framed by an intricately worked frame of gold 'twigs' of gold, detailed by twelve randomly placed claw set brilliant cut diamonds, triangular in form, fitted with pin and flexible bail