with a central quatrefoil motif set with a principal cushion sapphire between triangular shaped sapphires, within a diamond line frame, the diamond lines crossing over and extending to the articulated strap of rectangular cut sapphires in diamond line edges, engraved lozenge pattern to the gallery sides, French control marks, maker's mark, serial number 45991Length 18cm / 7ΒΌ''Weight: 36.5g
19th century large golden topaz and diamond cluster brooch, c.1850, the oval facetted topaz of approximately 34ct, secured by a diamond collet set gold mounted openwork foliate scroll border, all raised within a diamond cut down collet frame, the diamonds all of cushion, old brilliant, double-eight and rose cut, larger diamonds to the outer frame, mounted in silver and gold, total diamond weight approximately 5.10cts