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I prefer it to walk and quack like 2 ducks.

I don not know how you can justify calling a hone an Escher when it does not have an Escher label on it.

Seems that Eschers are so popular and pricey that every likes his German natural water hone...

I have a Goldfisch. IMHO you cannot compare them with Eschers. It is a fine German natural hone but much harder.
The label says it can be used with oil or water.