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Ah well, it was mere speculation after all. So then, a metamorphic rock with perhaps metaphysic properties. The mythical hone of plenty! :D

Well, who knows what was going on when this stone was forming. There could be trace amounts of organic material that, with water added, mimics the characteristics of soap. I think some salts have...

It's not some gas or air escaping from the stone. If that were the case, then it would do it without honing. The stone is not porous, but it's not perfectly flat either; there are irregularities in...

For bubbles to form, I would think there would need to be some elastic quality to the slurry. Just air escaping from the stone wouldn't do that. Perhaps there is a natural substance embedded in the...

Forgive me, as this post will add no value to this thread whatsoever (except for perhaps comic relief)...

This is obviously not a Belgian Coticule, but a coticule from France mined in the vicinity...