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7:51 PM
Hm, 4 wetstones, no idea what grits, how to figure out...
 
JRE
8:28 PM
Color is often a hint. Are they natural or manmade stones?
 
 
1 hour later…
9:29 PM
Manmade
@JRE all kinda white
 
JRE
Hmm. That sucks.
 
One night be a light yellow, the others just dirty
On one I can see structure, that's possibly 800 or 1000, the others must be finer. None of them is able of a shiny/mirror finish, that probably sets an upper limit
 

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