Category:Derbyshire Blue John
English: Derbyshire Blue John, a mineral mined only in Derbyshire, England.
semi-precious mineral | |||
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| Subclass of | fluorite, gemstone | ||
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| Location | Derbyshire, East Midlands, England, UK | ||
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Subcategories
This category has the following 6 subcategories, out of 6 total.