question about sandstone et al

["Richard Lawless" <rlawless@zzzzzzzzz>]

Hello, first off, I just joined, I hope I'm doing this correctly.  Part time sculptor, full time office jerk living in Missouri.  My father was a sculptor in St. Louis but died when I was young and I'm finding that now, as I finally take it up, I'm missing a great deal of information that at one time, was right at hand.

I've got a question about sandstone.  I suppose what I'm looking for is a good piece of resource material on stone in general.  Our library does not have what I need and google hasn't been too helpful.  I've got this piece of sandstone, very dark rust red.  Very soft, almost like a powder pressed together..  I can shape it by scraping it along the sidewalk.  I've made some small polyhedra using this method and a home made hand drill.  Can anyone identify it for me? I'm using it for a piece I'm making for an upcoming show and would like to be accurate in the description. How bout limestone?  Any good Limestone Bibles out there?  I have a small variety but would like to call them by name, I guess.

Thanks, Cheers, Ciao,
Richard Lawless. Columbia MO