Identifying surgical black arkansas?

[Littlebabycarrot]

I have a 3" black arkansas stone I got as part of a set from a local hardware store, and after enough reading and experience I think it is a surgical black stone. The other set of Arkansas i bought years ago I think just had a soft white and a hard arkansas included with a tri-hone setup. How can i tell if it is a surgical black or if it is just a true hard that is colored black?
I think it may be a surgical black bc it cuts super slowly, when burnished it reflects not just light but identifiable images... and bc the blades ive stropped with Chromium Oxide to a mirror finish can go back on that black stone with hardly any degradation(maybe just none i can see) in the polish.
So it is a surgical black right?

 

[Obsessed with Edges]

Sounds like a surgical black stone. I have one like that (2-3/4" pocket stone), labelled on it's leather slipcase as a 'Hall's ProEdge Surgical Black', and it behaves similarly. More of a burnishing & polishing stone, instead of cutting the steel much, and leaves very little swarf when using it. Also somewhat reflective, like you've described. Stones like these work well as edge aligners, much like a smooth, polished chef's steel would work to straighten a rolled edge on a blade.

 

[Littlebabycarrot]

*Sighs with relief* awesome. I had read posts by a few guys who pointed out not all black arkansas is surgical black and so i got nervous that I was one of those guys who labors under misapprehensions all his life.
The stones in and of themselves are not prohibitively expensive, but my take-home pay is prohibitively small, so things balance on the side of me sticking with what I have until it is definitive that I need something different. Thank you!