That one is super rare black giant !!
Nakayama Karasu with some pure white lines
And super uniform surface No lines or any inclusions at all
At first this stone feels like medium hard but when start to work it you will be surprised how good finish it leaves and how fine it is!
This kind of Karasu and Nakayama is imposible to find now and specially in White and Black. So it is High end Collectable stone !!
Feels very smooth on every thing i have tried no scratchenes or anything lives amazing finish on Knives tools and Razors
So all in all Very Beautiful super fine stone !
Max Size: 215mm 115mm 43mm