Tried in hardscaping but did not have much success. Realize I should have posted it in here. Does anyone have a wholesale supplier of Basalt Columns? I want to do some bubbling boulders with them, but nobody around here seems to stock them except a pond supplier which seems pricey. I talked to a supplier today and he made mention he would order some wholesale if I found a supplier. Anybody have some lead on these? Also, what are they like to core drill? Am I going to get half way through and they split on me? I've seen them done before and look quite nice as bubblers.