Tsushima Black (Kuro) Nagura Large Natural Sharpening Stone

Tsushima black nagura is a type of natural sharpening stone extracted from the sea bed of the island of Tsushima. It is about 6000 grit equivalent, and is great for kitchen knife and straight razor sharpening. The large Tsushima nagura can be used as a finishing stone for kitchen knives or as a pre-finisher for straight razors. 

Measurements (approx.):

205mm * 75mm * 50mm 
2000g

Note: Individual atural stone may vary slightly in apperance, size and weight.