Hardness Grit/Finess Speed/Strength Price in U.S.
10+ 10- 9+ SOLD
When used with a paste created by a diamond plate
10+ 10- 10+
Maybe the most beautiful iro or colored Nakayama stone you will ever see with natural colors that
look like a sunset. There are greens, yellows, oranges, purples and pastels of many descriptions.
And this stone has remarkable sharpening qualities, it is very hard and resists building a paste but
at the same time will cut the steel leaving a rich black iron pool within the clear water after
sharpening. Rich colored stones often are a bit softer, but this is a hard stone. The grit range is over
40,000 and may be closer to 43,000-45,000 level.
Reads on the stone top from the upper right down, JUN SHOSHIN HONYAMA (pure specially
chosen original mountain) which is a registered trade name
And 2 (an inventory or grading number)
And at the middle SAIKOKYUHIN (very best quality)
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 get the full use out of this
stone. These very hard stones are more easily used if a diamond nagura (DN) plate is used before
hand to build up a slurry.