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I guess that you know that these are suita strata stones, no big deal here though. They should kick up a creamy slurry on their own or a diamond DMT card will make one too. If you use these stones...

I have had a few Ohira stones that had the heavy renge content, so much so that the slurry looks rouge color, these stones are probably like that also. The lines in the stone are not distinctly Ohira...