Bones are the remains of one deceased, typically when a monster or player is killed. They are a 100% drop from most monsters, meaning that almost every monster will drop these. Some common exceptions are ghosts, shades (drop "remains" of their type), demons, imps, and spiders.
Bones are mainly used in the Prayer
skill, and burying them will give 4.5 experience each. Bones can also be offered at the altar in a player-owned house for up to 15.75 experience, or 18 Prayer experience when offered at the Ectofuntus. Players may also use the Bones to Bananas or Bones to Peaches spells to turn normal bones to edible bananas or peaches.
Bones will not drop to the floor if the player is carrying a bonecrusher, and are instead automatically buried.
25 bones are used in the Demon Slayer