Kill Ogres or Moss Giants.
A long bone is an item that giants sometimes drop. You can trade it in dorgesh-khaan for 1k construction xp and 1k gp. You can also get a curved bone which gives 2k contruction xp and 2k gp when traded in the city.
Jungle Hunting Area.
Bone weapons can be easily bought from the Grand Exchange at a reasonable price.
you get it from dungeoneering for 34k or 44k tokens
one
Babydragon bones give 30 prayer xp per bone if you bury it.
you can find sinebeam trees in Daemonheim on runescape
Redefine your question, don't make it too long or too short.
It depends how long you are on Runescape.
The bone spear on RuneScape can be obtained by purchasing it from the Grand Exchange in Varrock or from the Bone Weapons store run by Nardok after you're done with "The Lost Tribe" quest. The bone spear is a very weak weapon, and is not a very common weapon seen used by players in RuneScape. The more common Bronze to Rune weapons work better than bone weapons. Bone spears can also be obtained from monster drops by killing Cave Goblins and Cave Goblin Guards which are very easy to kill, as they are level 3 and level 24/26.
Yes, it is both Non-Members and Members.
You can't make bone bolts, you can only buy them off other players or at the Dorgesh Kaan shop.