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GRIT TEST FOR

SUITA#74

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SHIRO SUITA AWASEDO

220 - 82 - 54mm

2.4 kg. = 5.4 lbs.

The kanji at the upper right reads SEI HONZAN AWASE TOISHI (original mountain finishing stone).

And in the middle SAIKOKYUHIN (very best quality)

This giant shiro Suita stone is a true grade 24 awasedo. Grade 24 toishi are and always have been rare and expensive and this is a particularly fine example. It came from a store in a small town in Japan that closed in the 1970s containing stock dating back to the 1930s. The awasedo has not been used other than to test the quality at one edge of the stone as you can see in the photos and it is considered to be NEW/OLD STOCK. 

You can see results of a grit test that the sharpening qualities of  this stone compared to synthetic stones, this stone has a grit base of about 38,000 and with compression the grit particles will easily crush even finer.