There are many types of rocks other than geological rocks that are found in the ground. These include candy rocks, a form of hard sugar crystal; crack rocks, an addictive substance derived from cocaine; and Hot Rocks, a Rolling Stones CD. | There are many types of rocks other than geological rocks that are found in the ground. These include candy rocks, a form of hard sugar crystal; crack rocks, an addictive substance derived from cocaine; and Hot Rocks, a Rolling Stones CD. |