Mostly yes, Opa; it also doesn't have to be kiln-fired like clay, good for those who don't have a kiln or one big enough for the job. They suck watts like you wouldn't believe and get so hot, I'd be afraid to have one in the house (unless you used it for heating, as well...

). I suppose it can be dyed different colours, like cement, but the directions I've seen don't go there. That's all I know.
Happy Gardening.