Lot 13 A ruby and diamond-set openwork navette brooch, composed of a row of alternating ruby and rose-cut diamonds (with four later-added synthetic rubies), of navette form, in cut-down white metal mounts, with two additional rubies set to the inside of the ruby and diamond border, the round cabochon ruby and the marquise-shaped ruby in millegrained collet settings, brooch measuring 4.6cm x 2.6cm, with pin and C clasp fitting, pin stamped with Austrian Heron head mark indicating gold and silver, the pi

A ruby and diamond-set openwork navette brooch, composed of a row of alternating ruby and rose-cut diamonds (with four later-added synthetic rubies), of navette form, in cut-down white metal mounts, with two additional rubies set to the inside of the ruby and diamond border, the round cabochon ruby and the marquise-shaped ruby in millegrained collet settings, brooch measuring 4.6cm x 2.6cm, with pin and C clasp fitting, pin stamped with Austrian Heron head mark indicating gold and silver, the pin fitting surface testing as 18ct, 5.0 grams Please note: Unless otherwise stated, lots have been tested using an electronic tester. This is a surface test only and is not a guarantee of metal purity.