Blue John and Diamond Necklace
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Rare Blue John stone necklace with rose cut diamonds set in silver and gold. A uniquely colored variety of fluorite, Blue John is the rarest gemstone found in Britain. In all the world it is found in one single location, a legendary cave in Derbyshire, England. The stone has been prized for its beauty since Roman times. For centuries the stone has been exported to continental Europe for jewelry and decorative art design. Hallmarks indicate this necklace is Portuguese in origin.
Measures 20.50" in length. Hidden push tab closure at back.