It was listed by Corvidae Antique. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Corvidae Antique has dated this piece to the Georgian era.

The piece can be worn as a showstopping pendant or an eyecatching brooch - there is a pendant loop at the top and a brooch fixing with a locking C clasp which appears to be a useful later addition.
There are no hallmarks, as is nearly always the case with Georgian jewellery, but it tests positive for nine-carat gold.
Diameter: 5.5cm. The garnets vary in size from around 4mm to 6mm.
Weight: 12.4g.
Corvidae Antique has dated this piece to the Georgian era.
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You can view the stock and full dealer information on the Corvidae Antique Profile Page