In my search for rocks to sculpt I found some success with garden stones that are soft enough to carve and may have an interesting appearance. They’re no where near as pretty as the marble I’d like to carve, but they’ll do in a pinch.
Not all of them though. My first one appeared to have fractures. I chased them down and discovered that they went all the way through. So the first of them has broken into chunks and has been abandoned back to the flower bed.
Two left to try and neither have any apparent fracturing. I’m trying to decide what to carve them into.
They look like river rock, but might take a shine and be worth it as practice stones if nothing else.