- Joined
- Nov 4, 2009
- Messages
- 326
Have you ever taken a dull steel knife of reasonable hardness and sharpened it on a limestone rock? If so, how long did it take?
Nope, never have. Could if that was all I had, though. Not much limestone on my side of the mountain. Marble will sharpen, and that's mostly calcium carbonate if I remember my chemistry. Got plenty of soapstone, and that works but polishes up and loads quick. Got a lot of various sandstones that work, some coarser than one would like. Got plenty of sand and silt in the creeks. Got plain old dirt if it came to that.
As I keep saying, anything abrasive will sharpen. Some faster, some better, but given a piece of steel, the necessity for doing so, and a bit of time, you can get a working edge with the stuff all around us. Not something I would do by choice, but nice to know it can be done if necessary