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Thank you, do you have any more info on "Io" or a link for it?
The second stone has been cut (or lapped) in western mode, therefore tha back is like the front.

Hello everybody, I got a couple of hones, both on the fine side with a scratch pattern finer than king-6k
The first one is for sure a Jnat, please help me to identify name, type, quarry?, etc....