![](http://www.alamy.com/thumbs/6/DF06F162-5D1E-4F17-9F8E-B57C0BBE7F98/TTMF61.jpg)
Geological specimen of natural blue layered mineral Covellite (aka covelline) - semiprecious stone and copper ore, on blue background
Size: 4393px × 3295px
Photo credit: © Roman Belogorodov / Alamy / Afripics
License: Royalty Free
Model Released: No
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