Search:

My dmt 325 would not hardly touch it, so I used silicon carbide on plate glass and got it flat and clean. I will try to post some better pictures tomorrow. What is the grit of of a Hindostan?

This stone appears to be sedimentary.
It measures 15/16" x 2" x 8"
It produces a grey slurry
It is very hard and has a lot of grit like a coticule
Holding it to the light and looking down it, it...