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the pictures look red, but the stone is tan. When it is wet it has a little red cast to it.

It may be a India oil stone, but the color looks like a frictionite

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I lapped it with 90 grit, followed by180 grit on glass and finished up on a dmt 325. finally got it slick. when you look down the face at an angle looking at the like it shines like...

You may be right. The 325 would took forever. I got out the plate glass and the 90 grit silicon carbide lapping and took it to 180 grit, it took close to an hour and will have to work on it a little...

This stone is extremely hard a dmt 325 won't hardly touch it.
When I got it I looked like it was around a 200K, very porous.
It seems to be as hard as a Translucent, I was able to fatten it enough...