Hello.
I am new in the razors, this is my first message, I don't know if someone made this question before, though I believe that it's very specific.
I found in my house, in a box of my grandfather, a stone, i think it's for sharpening, of blue color with the inscription in a paper stuck in one of the sides that says:

(A image with one lion on a "R" into a circle)
RAPPOLD (the "O" is red)
RAPORID
MONOPOL
WETZER
Villach/Austria

Someone can say if this stone can sharpen razors and of that type is?
Thanks, regards. Stefano.