Rock

Rock may refer to any of the following:
 * Rock (elemental), a possibly useless item gained whilst mining elemental ore
 * Rock (limestone), an item that players may create accidentally whilst trying to make a limestone brick
 * Pet rock, an item obtained during and after The Fremennik Trials quest, which can act as an apparently useless two-handed weapon
 * Rock "A chunk of rock" found during Underground Pass.
 * A Physical boundary found in the environment.