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Old Tor Mine, Castleton, Derbyshire, England, UK Blue John Fluorite. Specimen size 7,5x5x3cm. Photo and collection Jorge M. Alves |
| © Jorge M. Alves | Photo ID: 98350 View Count: 244 |
Fluorite (Var: Blue John) : CaF2 | |
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Old Tor Mine, Castleton, Derbyshire, England, UK A piece of solid radially crystalline Blue John fluorite with dark and pale purple banding.Ideal piece for polishing or for location collector |
| © 2002 Thames Valley Minerals | Photo ID: 5449 View Count: 1047 |
Fluorite (Var: Blue John) : CaF2 | |
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Old Tor Mine, Castleton, Derbyshire, England, UK A piece of mottled light and dark violet blue Blue John has been polished on one face.The thickness of the specimen goes from 3.1cm to 4mm, which allows a little transmitted light when backlit - pretty! |
| © 2002 Thames Valley Minerals | Photo ID: 6347 View Count: 546 |
Fluorite (Var: Blue John) : CaF2 | |
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Old Tor Mine, Castleton, Derbyshire, England, UK A piece of radially crystalline and banded vein fluorite - Blue John. One the specimen there are a few vugs where the flurorite has formed rough cubic crystals.Nice old-time specimen of this classic English material. |
| © 2002 Thames Valley Minerals | Photo ID: 6079 View Count: 466 |
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