Pyrite in quartz 12,15 ct


  • Weight: 12,15 ct
  • Size: 21 x 11.5 x 6 mm
  • Origin: Brazil

Availability: In stock

SKU: PCI0029 Categories: , Tag:
In this sample the “pyrite” discs result green.
This is not a secondary transformation of the pyrite but a primary deposition of iron oxides in some area of the deposit.
This is due to the precipitation of green rust, a group of iron hydroxides probably due to bacterial biomineralization.
More info on this topic in the new book by Marco Campos Venuti, “Biominerals“.
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