Curved bone

A curved bone is an item dropped by monsters that drop big bones 100 percent of the time, such as ice giants, hill giants, moss giants, mogres, fire giants, trolls, ogres, suqahs, cave horrors, cyclopes, and warped tortoises, mutated jadinko guards, aquanites, and nail beast (during the Temple Trekking activity). Additionally, these bones may be obtained when looting a zombie impling jar.

Curved bones cannot be buried.

Curved bones may be sold to Barlak, a cave goblin found in Dorgesh-Kaan, for 2,000 coins. Players will also receive 2,250 Construction experience if their Construction level is 30 or above you need to of completed Death to the Dorgeshuun quest to enter.

List of monsters
Below is a list of monsters which drop curved bones:
 * Aquanites
 * Cave horrors
 * Crocodiles
 * Cyclopes
 * Dagannoth guardian
 * Desert Lizards
 * Fire giants
 * General Graardor
 * Giant Mole
 * Giant frogs
 * Giant skeletons
 * Goraks
 * Hill giants
 * Ice giants
 * Icelords
 * Kree'arra (very rare)
 * Mogres
 * Moss giants
 * Mountain trolls
 * Mutated jadinko guards
 * Nail beast
 * Ogres
 * Pit ogres (only during Love Story)
 * River troll
 * Rock Golems
 * Sea snake young
 * Sea trolls (from Swan Song)
 * Suqahs
 * Terror dogs
 * TokTz-Ket-Dill
 * Tortoise
 * Tree spirit
 * Trolls
 * Warped tortoises
 * Yeti (including Nial Swiftfling in his Yeti form)