Late 18th / early 19th century graduated diamond collet necklace, c.1800,

Late 18th / early 19th century graduated diamond collet necklace, c.1800,
Price: More than £50,000
Ref No. 04152
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Description
, the single row of 57 diamonds of square and rectangular cushion, old oval and pear cuts, each close cut-down collet set in silver and gold, upon an oblong cluster clasp with three stones to middle bordered by a line and flanked by twin stones to either side, also cut down collet set in silver and gold, very approximately 31cts of diamonds in all
Length 39.5cm / 15�''
Weight: 44.5g
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Victorian cabochon emerald and 18ct gold ring, London (date mark is either 1878 or 1898), the oval 6.49ct Colombian emerald open collet set to a simple tapering gold mount, D shaped shank, accompanied by AGL report no. 1118060 giving the Colombian origin opinion and that the stone shows minor clarity treatment of a traditional type (oiling)
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S.J. Phillips