Hardness   Grit/Finess   Speed/Strength   Price in U.S.
10+               9++                8                         SOLD      
When used with a paste created by a diamond plate  
10+               9++              10-
naka25.jpg (303618 bytes)

Reads on the stone top from the upper right down, SHIN HON YAMA AWASE TOISHI (pure
original mountain finishing stone) which is a registered trade name

And at the middle SAIKOKYUHIN (very best quality)

This Nakayama Maruka awasedo toishi stone is NEW/OLD stock from a closed store in
Japan. It has not been used other than to test the quality at one edge of the stone as you can
see in the photos.

You may find other references to the Maruka Nakayama mines on the internet. This mine was
known throughout its history to produce the finest awasedo finishing stones in Japan and
probably in the world. The Maruka stamp on the end, the registered stamp on the top of this
stone and the single toothed fine saw marks help to date the stone to before WW2.

This is an actual Maruka Nakayama awasedo, it is not a fake. Stones of this color and variety
have not been mined from Nakayama for well over three quarters of a century and they never
will be mined again as these rare deposits are depleted. The mine was closed in the 1960s
and I will not be able to replace or offer these stones again.

This is a very hard stone and it requires advanced sharpening skills to use. The change in
color indicates it is from the edge of the strata. These very hard stones are more easily used
if a diamond nagura (DN) plate is used before hand to build up a slurry.