Long bone

A long bone may be dropped by monsters that will drop big bones 100 percent of the time, such as hill, moss and fire giants, mogres, trolls, ogres and cyclopes.

Long bones may be sold to Barlak, a Dorgesh-Kaan cave goblin, for 1,000 coins each. Players will also be given a lecture on Construction, granting 1,500 Construction experience (as long as your construction level is at least 30).

Long bones will give 15 Prayer experience points when buried although, given the ability to exchange these bones for coins and experience, this course of action is certainly not recommended.

Long bones are NOT tradeable.

If you have reached a certain point in The Chosen Commander quest, Barlak will be too startled to talk about the bones.

Since the improvement of the Impetuous Impulses activity, it is also possible to obtain long bones when looting Zombie impling jars.

Strategy
Requires access to dorgeshun city and 30 construction

Although thereare many monsters that drop this, it is fairly rare. A good place to collect them is the Enchanted Valley. Monsters like river trolls, nature spirits, and rock golems that have very low combat levels make collecting them quicker, plus they all drop big bones, adding prayer exp as well as well as 1500 construction exp per long bone.

List of monsters that drop this item

 * Aquanites
 * Cave horrors
 * Crocodiles
 * Cyclopes
 * Dagannoth guardian
 * Desert lizards
 * Fire giants
 * General Graardor
 * Giant frogs
 * Giant Mole
 * Giant skeletons
 * Goraks
 * Hill giants
 * Ice giants
 * Icelords
 * Mogres
 * Moss giants
 * Ogres
 * Suqahs
 * Terror dogs
 * Tortoise
 * TokTz-Ket-Dill
 * Trolls
 * Warped tortoises