519
A George III onyx and diamond brooch, early 19th century and later, designed as a bow
A George III onyx and diamond brooch, early 19th century and later, designed as a bow, centring on a polished cabochon of banded onyx, within a surround of rose-cut diamonds, mounted in silver and gold, length 4cm, composite, converted from a clasp, later brooch fitting, case
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