I stepped on this tangerine-sized rock one day while out in our "rock yard" and through, "Hmm. That has good cutting potential." So I went inside and threw it in the 12" saw. When it got finished and I opened up the hood I was amazed! Im not exactly sure what kind of agate this is but my best guess would be that it is a gnarly tube agate of some kind. Whatever it is, this sexy little thang is seriously one-of-a-kind!