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