vintage fine grit razor hone sharpening stone bluish grey natural escher look

I have for auction a fine grit natural mined razor hone sharpening stone. It is blueish grey in color. Both surfaces are almost flat, and will only require a minute or less to lapp it flat. It measures 4 15/16'' long. It is 1'' wide. And it is a strong 9/16'' thick. the slurry is a light medium grey color. I achieved the slurry in mere seconds with 500 grit sand paper. .There is a couple minor chips/ nicks on the edges.. Please see pictures for condition. buyer pays shipping and delivery confirmation usps priority mail. thanks for looking.