last weekend i found myself camped by a creek here in switzerland. getting some much needed r&r. didnt bring much to entain myself other than my shaveing kit ( shaveing in the woods is devine) and my pocket knife to wittle with . the piece of wood i was working on was some sort of hardwood and inbeded with sand to boot ,needless to say my knife dulled quickly . what to do? well lot of faily flat rocks at hand i picked up one that had a very flat side and stroked away. wow sharpend right up not the best edge ever but it worked. so i took this rock home and worked it over with a dmt.and now my edge shaves, polished bevels. got me to thinking could any rock be a razor hone just laying there waiting to be lapped?the one i have now is too small to be a razor hone but ill be looking for the right size soon . what do you think?