Blue John – Yorkshire Jewellery Company

Collection: Blue John

Blue John which is also known as Derbyshire Fluorspar, is a semi precious gemstone mineral, a unique form of fluorite with distinctive bands of a purple, blue and yellowish colouring, found only in Blue John and Treak Cliff Caverns, Castleton, Derbyshire. Blue John is a heavily crystallised formation and occasionally surface marks can be seen. This is not detrimental to the stone and in fact enhances its individuality. It has been seen that certain specimens of Blue John show signs of fluorescence on exposure to ultraviolet light, but this is the exception rather than the rule.

The gemstone is the most highly prized ornamental variety of Fluor-Spar (Calcium Fluoride), differing from any other variations of flour-spar due to its unique crystal structure, and banded veins of colour which run through the stone. During the 18th and 19th centuries Blue John was mined for its ornamental value, producing exquisite bowls, eggs and goblets. 

Splendid unique specimens of Blue John stone can be found in collections throughout the world. The mines are sadly now largely extinct, however, small veins and nodules of fine quality Blue John stone of sufficient size for jewellery can still be found. 

14 products
  • Double Sided Whitby Jet & Birthstone Heart Pendant
    Regular price
    £59.00
    Sale price
    £59.00
  • Double Sided Whitby Jet & Blue John Heart CZ Pendant
    Regular price
    £59.00
    Sale price
    £59.00
  • Blue John Modern Pendant
    Regular price
    £55.00
    Sale price
    £55.00
  • Blue John Heart Pendant
    Regular price
    £49.00
    Sale price
    £49.00
  • Blue John Large Oval Gents Cufflinks
    Regular price
    £79.00
    Sale price
    £79.00
  • Blue John Medium Oval Gents Cufflinks
    Regular price
    £69.00
    Sale price
    £69.00
  • Blue John Small Designer Bar Pendant
    Regular price
    £39.00
    Sale price
    £39.00
  • Blue John Segment Pendant
    Regular price
    £79.00
    Sale price
    £79.00
  • GIFT CARDS
    Regular price
    £10.00
    Sale price
    £10.00
  • Blue John Contemporary Drop Pendant
    Regular price
    £89.00
    Sale price
    £89.00
  • Blue John Medium Contemporary Drop Pendant
    Regular price
    £55.00
    Sale price
    £55.00
  • Blue John Rectangular Gents Cufflinks
    Regular price
    £89.00
    Sale price
    £89.00
  • Blue John Medium Teardrop Pendant
    Regular price
    £45.00
    Sale price
    £45.00
  • Blue John Long Drop Pendant
    Regular price
    £89.00
    Sale price
    £89.00