![](http://www.alamy.com/thumbs/6/A5E1F609-995D-4D6C-9538-212E2C61C7CD/BCFADE.jpg)
Calcite Nail Head Spar from Rodderup (Rotherhope) Mine, Alston Moor District, Cumbria, UK
Size: 5100px × 3400px
Photo credit: © Sabena Jane Blackbird / Alamy / Afripics
License: Licensed
Model Released: No
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