Search:

Its the slurry from the slurry stone which is doing the work, the ark has little to do with it, so it would not matter if it is a translucent or black just my opinion using slurry on an ark is...

A few years ago, there were far fewer classifications, me thinks many of the ones we have today are made up by sellers of recent times.
Not that the more recent classifications are not cool and all,...

Its a hard black Arkansas stone, you can tell by the discoloration in the lower left about 3 inches from the edge.