Mikawa Nagura 1843g or mixed with suitable binder

or mixed with suitable binder to create a polishing compound

These are A4 sheets of plastic film with polycrystalline diamond embedded

#120 Polycrystalline diamonds electroplated onto a 1mm aluminium sheet

due to the shape

Mikawa Nagura 1843g or mixed with suitable binderMikawa Nagura are formed from lithified volcanic ash. Mined in Aichi prefecture starting 700 years ago, they have been used in traditional Japanese sword polishing progressions. The mine has been closed since the 1970s. We receive the stones from the wholesaler with rough chisel marks on both sides, and flatten them in our workshop. Although we have made a good effort to provide a flat surface for usage, we strongly recommend end users flatten the