I was given several optunia(?) chunks, as well as several other things, and I'm so not a cactus person (yet!) that I haven't done anything with them yet...I have to find to right pot and the right location, because they're outside plants, but can't be in too much rain (check Seattle's weather for the past few days!) So I guess I'll put them in perlite until I can decide, cause they're just in the plastic pot that I put them in when I got them
Amazingly they look great still!