A zircon, chrysoberyl and marcasite ring

A zircon, chrysoberyl and marcasite ring, with a circular mixed cut white zircon, rub set, with a mixed cut chrysoberyl rub set above and below, with a marcasite grain set to a foliate collet at each side, the Georgian silver head to a later gold shank, with pierced shoulders, tested as approximately silver and 18ct gold, head 17mm wide, 2.26g, in a case by F. K. Perkins & Sons, Wakefield.
Finger size N-O approximately
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