Bones

Bones are items dropped by many creatures in RuneScape Classic. You can bury them for 3.75 Prayer experience. To gain fast bones, people kill chickens. However, this bone provides the lowest burying experience in RuneScape Classic and it is the most dropped bone. If a player dies in a fight he will always drop bones, even if he does not have this item in his/her inventory.

Bones are dropped by almost everything in Runescape. The most notable monsters that don't are Demons, and monsters that drop higher level bones such as big bones, or Dragon bones.