I just put the last of a 40lb. box of petrified wood rough into my tumblers for first stage.
I moved on to my next 'mystery box' of tumbling rough and I found a pile of large jade chunks (which will be miserable for me to break-up)--
Jade being the world's toughest natural mineral (diamond = the hardest, but brittle).
I also found a few large chunks of this material:
I know everyone in the Rock Forum could pick this material out almost instantly. Anyone care to guess here?
Hint: The volcanic nature of the stone is very different than the same material I can find in my area.
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