That carborundum jewel, sparkling amid all the better stones. The pyrite in the goldmine, the rough that defines the diamonds.
Somewhere I have a black diamond scythestone and I want to say it is actually a natural. Coarse but natural.
Edit: see page 5 of the mystery hone thread:
Mystery hones... Let's see what you have
The third is a keeper. I was oil soaked black when I got it. I bought it because is is heavy and dense for it size that is 9 x 2 1/8 x 1 inch thick. After a few days in the dip, out came a purple stone. It is not porous at all. No oil remained or leached out. Lapping shows a busy stone. It is on...
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