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Pteridomania-  Fern Fossil Cabochons 1x2in Lot of 6

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Fern Fossil cabochons cut by myself and also mined by me.
From the st clair location, the worlds only known source for these aesthetically pleasing white on black fern fossils. These specimens are 300 million years old, they saw the light of day for the time earlier this year when I lovingly unearthed them to bring to you.

They vary in thickness, they are not calibrated cabs.
Both sides are pictured, there are fossilized ferns on both sides in most cases. They are an excellent documentation of the fossil record. Each layer represents a layer of the fossil record, like the growthrings of a tree.
The mineralization is Pyrophyllite, a phyllosilicate mineral composed of aluminium silicate hydroxide ( Al2Si4O10(OH)2 ). Pyrophyllite is a pyrite pseudomorph.
The orange coloration comes from the presence of iron.
These fossils are totally natural, they have not been "painted on" or otherwise altered in any way.
Most of the specimens will shed the white upon being washed, but in some instances rare layers of the deposit will retain their white coloration even after being scrubbed with a brush in running water. This is my high standard for jewelry quality, I bring you only the very best pristine specimens. The shale these fern fossils occur on is a hardness of 2-3 and can be drilled through quite easily. Upon request I can drill these cabochons to accommodate a bail or you can easily do this yourself with a regular drill bit, diamond bits are not required for this material.

Feel free to contact me if you are interested in larger specimens with multiple species or custom shaped cabs. I am the primary source for this material and I am happy to accommodate custom and wholesale orders.

Pteridomania- Fern Fossil Cabochons 1x2in Lot of 6


  • Handmade Supply
  • Material: fern fossils
  • Ships worldwide from United States
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