#212 Classic kiita (yellow) koppa from the Nakayama mine. Extremely pure example with no "su" lines. This size nook stone has been used since ancient times for kamisori or small tools, and if used for such the stone can last for generations. With kawa skin in ocher and burnt umber that sparkles in the sun.
Odd size is roughly: 13-15cm long x 4.5-7cm wide x 3.3-2.5cm thick. Fits nicely in the hand as a hand-held stone, or on its flattened back for on a table.
#212 Nakayama kiita koppa
All of my stones are sold with a money-back guarantee minus the return shipping if within 30 days of the sale and returned in their original state. Please do not lacquer the stone if you have any intention of returning it.
I encourage sealing the sides of all sedimentary stones, especially if there a inclusions, cracks, or fissures and or if the stone is used in an active workshop where the stone is constantly wet. For casual use, sealing, especially all four sides, and preferably the back with one of either a marine type of spar varnish, a synthetic lacquer, urushi, or a cashew-derived lacquer is prudent.