Looking for an ID on these stones

I'd appreciate any information I can get on these stones. First and foremost, are they for straight razors? Second, are they decent and usable?
My wife came across them setting up a house for an Estate Sale-that's her business and fortunately it gets me first dibs on lots of great shave gear.
I have primitive honing skills, but really would like to improve them. I have a Belgian Blue Coticule as my only other stone-that was a gift from my barber.
Thanks for any info I can get.

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The first one might be a hindostan, quarried in Indiana and commonly used for headstones. They have that sort of wood grain appearance. Useful for razors.

The second is an Arkansas stone, don't know if it's good for razors. Other folks here will know.

The third one is gray. More than that I cannot say.

My guess is the first two are washitas and the last is a carbo barbers hone. I had one like the barbers home a while back. Just a guess though. Can you clean the first one up do we can have a better look.

I agree with the ids offered. For the Carborundum hone, have you tried reading the front of the box, and is the stone # still visable on the end? Some are more usefull for razors then others.

1 maybe a hindo 2 washita you can set bevels with it and 3 carborundum hone

Thanks for the great info everybody!!!