Pile of rock (also known as limestone rock) is a rock from which limestone can be mined. Three can be mined from the rock before it is depleted. Limestone is used in several skills: Mining, Crafting, and Construction. It also finds some use in several quests.
Warning: Attempting to smelt the limestone without proper glove protection will inflict 8 points of damage.
The probability for a player to receive a limestone drop is shown for varying levels in the figure below. The rock will deplete after receiving the clay. Mining gloves and its variants do not affect pile of rock depletion.