Treasure chest

To disarm a trap on a treasure chest, you need to right-click it and choose "Search for Traps Chest." To disable a trap on a staircase, select "Investigate Stairs" to find the trap. Be careful, because the trap will be reset later on. Search for traps Chest Investigate Stairs

http://runescape.salmoneus.net/images/srctrapchest.gif

After you search a treasure chest for a trap, you will open it up and look for any treasure. Some chests contain coins, while other may have Runes or other items inside.

__________________________________
 * Chest treasure | Thieving Level |

10 gp                  10

1 nature rune + 3gp    28

50 gp                  43

5 steel arrowheads + 20gp                 47

2 Blood runes          59 + 500gp

Adamant ore + 1000gp + 72 Uncut sapphire + shark