One good old man gave me this stone. He only said that it belonged to his father. He doesn't know anything else about it.
The stone was very dirty and quite damaged. I cleanned it up and aligned it on a diamond plate. After this I плискаше it on a glass with silicone carbide. This is the result. The red polish is original. I didn't make it myself.

It really seems like some kind of Japanes stone to me, but I am not sure. I haven't used it yet.

I will be very thankful, if you can help me identify it.

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