This relatively large demantoid stone mounted in a bow and swag diamond brooch c.1890 is estimated at £3000-4000 at Matthew Barton of Olympia Auctions on November 20.
This relatively large stone above with its distinctive ‘horsetail’ inclusions caused by the presence of fine asbestos fibres (unique to demantoid garnets) is mounted in a bow and swag diamond brooch c.1890, which makes it highly likely that it is in the original setting.
The estimate is £3000-4000 at Matthew Barton of Olympia Auctions on November 20.
