An English Blue John urn on black marble base, ca. 1900

H.: 19,2 cm (incl. stand and cover)

Blue John is a rare, banded variety of fluorite, found only in Derbyshire, England, prized for its striking blue and purple colors and used in decorative objects and jewelry. The name “Blue John” likely comes from the French phrase bleu-jaune, meaning “blue-yellow,” reflecting its coloration.

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