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But how to be sure? From what I have found, many chinese rock types have been used for making Suzuri's. Also, suzuri's are used to grind down a solid inkbar into small particles of a very specific...

So it's either slate or PHIG according to you guys. Difficult to determine and since I'm new to all of this, trying on my only razor doesn't seem like a good idea...

what he says :)
I would be surprised if it was a Belgian stone, since my father himself brought it from China many, many years ago.

So I got to the hardware store today and picked up some sheets of 320 grit water resistant sanding paper. Then I spent 40 minutes on my knees in the garage, flattening the inkstone to perfection. The...

Aha, so it has been done before!
To be honest: I am completely new to honing and have no clue as for what I'm looking for in a stone. Will probably flatten the underside up and take it from there......

So, at the risk of asking some completely obvious and stupid questions:
When looking at all the pictures of stones on this site, I was thinking "I have seen this before". I went digging in my closet...