Chalcedony with white circle

[Blackfoot58]

I found this chuck of chalcedony today.
I’m guessing that’s a fossil ring in the center.

 

[Red-Coat]

Interesting find. Around the circular portion there appear to be five projections, giving it a five-sided appearance. Pentagonal symmetry and structures are almost exclusively from the phylum Echinodermata (marine invertebrates such as starfish, sea urchins and crinoids). I would guess it to be crinoid-related and part of the columnal.

 

[Blackfoot58]

Interesting find. Around the circular portion there appear to be five projections, giving it a five-sided appearance. Pentagonal symmetry and structures are almost exclusively from the phylum Echinodermata (marine invertebrates such as starfish, sea urchins and crinoids). I would guess it to be crinoid-related and part of the columnal.

Thanks for the info. As always, I appreciate your knowledge.

 

[Trezurehunter]

Neat piece.