19th century pink topaz and ropetwist gold brooch, French c.1860, with a principal cushion cut stone of approximately 23ct,

19th century pink topaz and ropetwist gold brooch, French c.1860, with a principal cushion cut stone of approximately 23ct,
Price: £10,000-£20,000
Ref No. 05190A2
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Description
horizontally oriented and hung with a pear shaped facetted drop, all crimp-collet open set with ropetwist borders, mounted in gold testing as 18ct, French gold mark and partial workshop mark
Length 4.6cm / 1�''
Width 2.4cm / 15/16''
Principal topaz approximately 20.5 x 18.0 x 7.60mm
Weight: 10g
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S.J. Phillips