A Demantoid garnet and diamond tortoise brooch

A Demantoid garnet and diamond tortoise brooch

Late 19th century demantoid garnet and diamond tortoise brooch, c.1890, the back set with round facetted demantoids in gold, bordered by old brilliant cut diamonds, rose cut diamonds to the head, legs and tail, cabochon ruby accent eyes, mounted in platinum topped gold, open set.

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