MY front entry has a white granite slab about 6 feet long and some one area I guess a vein of differnt color causes a black like streak. I thing I need a diamond disk for my drill. What would you suggest? Other grits have no effect on it.
what are you trying to do? if you want to cut it out, yes, a cheap diamond disk in a 4" side grinder will work or a 7" in your skilsaw. don't breath the dust, it's really bad for your lungs and you're only issued 1 pair.
I don't want to cut it out, just smooth out the dark raised area. It makes the step look dirty.
you're not going to smooth it out with a normal tool. you need a stone polisher, sorta like
note that if it's a dark vein, it could go to some depth into the stone. it may not be on the surface only.
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