Thread: Hone ID please!

I bought this hone at an antique store for about 10 dollars! I have past up this hone several times in the past 2 years thinking it was just a piece of cut stone! Yesterday I was in the area doing repairs so I thought I would take a look and see what they had! I asked about razor hones, and she pulled this one out, so I tested it and was satisfied that it was indeed a hone! My tests so far seem to indicate that it is finer than a Blue Belgian! It is a very hard stone and cuts slowly with an almost non existent scratch pattern, but it definitely removes metal! It has a glassy appearance when held to the light at the right angle, sort of like an Escher, although I am not certain that this stone is as fine as an escher, but I will soon find out!
Anyone have any ideas?