Attachment 96751Attachment 96752Attachment 96753Attachment 96754i was at a fle market,when i saw these two stones the man had 5or6 different stones i got these two he told me thay were nat waterstones,thay are like yellow slate one has redish vaines on one side.i have laped them both thay are very hard with a milky white slurry ,not sure of grit but thay polished up an old filli and gave a smooth shave,i will try the one with the cut corner to see what its like..will let you know how it goes...thanks:D