You will receive one of the two nagura pictured.
These rare, old mined Kizuyama tomo nagura are a rare piece of natural whetstone history. Kizuyama is a lesser known, Tanba Area mine which was closed down in the late 1970's. The stones are very similar to Maruoyama/Ipponmatsu, which is located in close proximity.
Tanba is a very diverse mining area with harder stone mines like Yaginoshima, excellent naka toishi in aoto, and softer, polishing stones like Maruoyama.
Kizuyama can be characterized as somewhere in the middle of that, producing semi firm, easy to use stones, similar to Maruoyama.
These examples were likely mined from the shallower Tenjou Tomae layer which is well known for colorful, mellow, yet highly abrasive stones.
These nagura are perfect for pre finishing or light repair on edges which have lost their "fresh off the stone" keen feeling.
They offer unique, live feedback with excellent scratch removal and polishing characteristics. If used on a harder 4+ base stone, they will produce slurry which is primarily from the nagura in most cases.
When used for knives, they will provide some tooth/bite to the edges on harder finishing stones. They are also great for adding haze/contrast to a kasumi finish.
Whether using these nagura for stone surface conditioning, which is does very well, or honing, you can rest assured that you're using a museum quality nagura with rich history.
