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Message: [QUOTE="combatwombat, post: 447569, member: 14119"] In my neck of the woods, smooth rocks only come out of streams and glaciers and they're small. Nothing over about 8". If you want boulders, it's basalt. Grey, dark grey, or black. It's what everyone builds water features with here. You can get round boulders, but they come from Montana and beyond and are shockingly expensive. The way rip rap/class 200 was explained to me by the quarry is that it's "rough sorted" and that a load of it will get you about 80-90% "1-man boulders" (aka wall rock) and the rest of it will be smaller cobble down to about 6" and a little bit of fines that will need to be washed before placement. All basalts here seem to be quite angular, but the edges aren't too sharp. $18/ton is, indeed extremely cheap. Leaves me a little skeptical, too! [/QUOTE]