Estate sale ring

Got this at an estate sale. I’m not sure if it is NA. I have never seen a stone like this but I absolutely love it! The only mark I found is “sterling”. It had very dark patina and I did use a sunshine cloth to clean it up a bit. I would like to know if anyone could identity the stone and any idea of the maker. Love this site and appreciate all of your help.


Pretty stone. Looks like moss agate from the photo. Love the snakes. Not sure if NA but nice.


Ditto the moss agate suggestion. No idea of NA or not, but I would clean up the tarnish.


yes most likely green moss agate or possibly chrysocolla in quartz (only as I have seen a bluer example similar to this before)