Baby blue dragon bone

Not to be confused with the 100% drop from red/blue/black Baby dragons, Babydragon bones.

The Baby dragon bone is a quest item dropped by Baby blue dragons during the Rag and Bone Man quest. The bone must be cleaned by adding it to a pot of vinegar and then boiled over the fire by the Odd Old Man's house north east of Varrock. Once cleaned, the bone can be given to the old man.