What kind of sharpening stone is this?



It is extremely cheap, 1,5 euro.
It has two different combinations. One looks like 4000grint and the other side 8000grint, but this is only my speculation as the box describes nothing.
Dimensions: 200x50x25mm
Aluminium Oxide is written.


Is this a water stone or an oil stone?
Can I use it to sharpen my razor?

Does anybody know this stone?

Thank you.