I need to get rid of a whole bunch of rocks and gravel, how much will it cost? The quick answer is that is will be expensive. Expensive will be qualified in a minute. First though, the best thing to do is to find someone nearby who is looking for more rock for their property and give it to them. Not easy, but definitely cheaper. There's field stone, river rock, limestone, and the list goes on. Most all types of rock can be purchased for $25 to $55 per ton. Rock is sold in the same way sand is, by the ton. Installing Decorative Rock. Colorado Materials offers many sizes and colors of decorative rock to choose from for your landscape project. To customize your landscape, see our display areas to find the product best suited for you. For high-traffic areas, driveways and walkways, we recommend ¾” rock, road base or breeze products. Aug 15, 2018 · Since there are so many rock types out there, the costs can vary anywhere from $30 to $100 per ton or $30 to $65 per cubic foot, depending on the rock type. Larger landscaping rocks, such as boulders, can cost upwards of $800 per ton. There's field stone, river rock, limestone, and the list goes on. Most all types of rock can be purchased for $25 to $55 per ton. Rock is sold in the same way sand is, by the ton.