I realize there is a cut-flat option from the vendor, but there is already a 50lb box of Marco rock sitting under my desk waiting for a home. I've got a shallow tank coming in a month or so and would like to make use of some pieces in part of the tank to create a lagoon look. I've thought about tile saw, but some pieces are 7-8" in diameter and not a clean circle or easy to cut 180º. I've thought about some other hand-powered options, but if someone has a better idea, that has done this, please fire away.