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A sapphire & diamond platinum & 18ct white gold brooch

This beautiful platinum brooch was made in the early 1900s.
It was probably originally a pendant that was later converted into a brooch by the additional of an 18ct white gold double pronged fitting.

In the centre of the brooch is an oval sapphire set amongst delicate diamond set filigree work with a diamond briolette drop.

Estimated weights colours & clarities:
The sapphire:
Estimated weight: 3.75ct
Cut: oval mixed step cut
Estimated colour: transparent cornflower blue - Sri Lankan
Estimated clarity: EC (eye clean) with no evidence of heat treatment

The 63 diamonds:
Estimated weight: 1.80ct
Cut: round old cut
Estimated colour: F - I
Estimated clarity: VS - SI

The diamond:
Estimated weight: 0.75ct
Cut: briolette cut
Estimated colour: L - M
Estimated clarity: VS

Dimensions: 74 x 33mm
Weight: 0.37ozs - 10.6gms

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.