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Blue & yellow sapphire & diamond brooch set in 14ct yellow gold & platinum

This spectacular vintage brooch is made of 14ct yellow gold & platinum.

In the centre is a cushion cut yellow sapphire set in a 14ct yellow gold foliate surround.

There are 6 cushion cut blue sapphires set in a half circle around the top of the brooch.
Between the sap[hires but set at the end of a platinum bar are 6 round diamonds..

A platinum diamond set scroll protrudes between the 5th & 6th blue sapphires and a platinum diamond set triple scroll curls around the base of the brooch.

The brooch has a double prong pin fastener.

Estimated weights colours & clarities
The yellow sapphire:
Estimated weight: 8.25ct
Cut: cushion mixed step cut
Estimated colour: transparent yellow (Sri Lankan)
Estimated clarity: MI (moderately included) no evidence of heat treatment

The 6 blue sapphires:
Total estimated weight: 11.40ct
Cut: cushion mixed step cut
Estimated colour: transparent blue (Sri Lankan)
Estimated clarity: LI (lightly included) no evidence of heat treatment

The 21 diamonds:
Total estimated weight: 1.10ct
Cut: round brilliant cut
Estimated colour: E - F
Estimated clarity: SI

Weight: 0.71ozs - 20.1gms
Dimensions: 1.5ins x 1.75ins - 4cms x 4.7cms

Weights, colours & clarities of the stones are estimated as the stones have been examined and measured in their settings. Where the stones carry an independent certificate this will be indicated.