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Posted by: Jolyon & Katya Ralph
That's a lot of messages but you haven't addressed yet (or rectified) your provably false statement:
"Agates form in volcanic rocks or volcanic ash related to volcanism, only. So-called sedimentary agates are found under ash beds that was the silica source. "
note: in your MANY previous messages you seem to reference previous statements by people without quoting what you are actually replying to, hence it's impossible to follow the thread of your responses. Remember the 'REPLY' button under a message simply replies to the whole thread, not an individual message.
I do, however, support your proposal to redefine agate as a 'rock' rather than a variety of chalcedony! It's no more pure chalcedony than flint is.