| Name   | Location   | Market price   | Quest | Members Only | 
| Onyx amulet (unstrung) | Player made (See Notes Section). | 0 gp | No | Yes | 
| Onyx ring (i) | Player made (See Notes Section). | --- | No | Yes | 
| Oomlie hen | Result of checking an Oomlie hen; Result of breeding chickens at Player-Owned Farms. | 0 gp | No | Yes | 
| Opulent wine goblet (damaged) | Obtained by excavating Lodge bar debris; Obtained by completing Infernal Source Site Research and the Zamorakian Special Research "Starry Eyed"; Obtained by opening Ancient caskets. | --- | No | Yes | 
| Orange (Gower) | Found in a basket under a table in the dark hole on the way to 'Behind the scenes'. | --- | Yes | No | 
| Orange afro | Bought from Party Pete, in the Falador Party Room, for 50gp. | --- | No | No | 
| Orange circle | Player made (See Notes Section). | --- | Yes | Yes | 
| Orange goblin mail | Player made (See Notes Section). | --- | Yes | No | 
| Orange key | Dropped by Ghost in Melzar's Maze. | --- | No | No | 
| Orange pentagon | Player made (See Notes Section). | --- | Yes | Yes | 
| Orange salamander (checked) | Result of breeding salamanders at the Ranch Out of Time. | 0 gp | No | Yes | 
| Orange sapling | Player made (See Notes Section). | --- | No | Yes | 
| Orange seedling | Player made (See Notes Section); Bought from Coeden in Prifddinas. | --- | No | Yes | 
| Orange seedling (w) | Player made (See Notes Section). | --- | No | Yes | 
| Orange spice (1) | Monster Drop; Player Made (See Notes). | --- | Yes | Yes | 
| Orange spice (2) | Monster Drop; Player Made (See Notes). | --- | Yes | Yes | 
| Orange spice (3) | Monster Drop; Player Made (See Notes). | --- | Yes | Yes | 
| Orange spice (4) | Monster Drop; Player Made (See Notes). | --- | Yes | Yes | 
| Orange square | Player made (See Notes Section). | --- | Yes | Yes | 
| Orange triangle | Player made (See Notes Section). | --- | Yes | Yes | 
| Oranges (1) | Player made (See Notes Section). | 0 gp | No | Yes | 
| Oranges (2) | Player made (See Notes Section). | 0 gp | No | Yes | 
| Oranges (3) | Player made (See Notes Section). | 0 gp | No | Yes | 
| Oranges (4) | Player made (See Notes Section). | 0 gp | No | Yes | 
| Orb | Use an enchant jewelry spell on a Cylinder/Icosahendron/Pentamid/Cube. | --- | Yes | Yes | 
| Orb (Devious Minds) | Given to you by the monk west of the Temple on the river Salve. | --- | Yes | Yes | 
| Orb of Armadyl | Player made (See Notes Section). | --- | No | Yes | 
| Orb of corrupted anima | Dropped by Telos, The Warden. | --- | No | Yes | 
| Orb of counting | Furaq's stall in Al Kharid. | 0 gp | No | No | 
| Orb of light | None. | --- | Yes | Yes | 
| Orb of oculus | Bought from Faruq in Al Kharid. | --- | No | No | 
| Orb of protection | In a chest in one of the ruins of the Khazard Stronghold. | --- | Yes | Yes | 
| Orb of pure anima | Dropped by Telos, The Warden. | --- | No | Yes | 
| Orb of volcanic anima | Dropped by Telos, The Warden. | --- | No | Yes | 
| Orbs of protection | Monster drop. | --- | Yes | Yes | 
| Orchid seed (Pink) | Given to you by Lyra, at the allotment west of 
Port Phasmatys, after growing her a patch of onions. | --- | Yes | Yes | 
| Orchid seed (Yellow) | Given to you by Lyra, at the allotment west of 
Port Phasmatys, after growing her a patch of onions. | --- | Yes | Yes | 
| Order journal page | Monster Drop; in the Ascension Dungeon library. | --- | No | Yes | 
| Order of Dis robes (damaged) | Obtained by excavating Sacrificial altar; Obtained by completing Infernal Source Site Research; Obtained by opening Ancient caskets. | --- | No | Yes | 
| Ore bag | Given to you by Doric when you start What's Mine is Yours quest. | --- | Yes | No | 
| Origami balloon | Player made (See Notes Section). | --- | Yes | Yes | 
| Ork cleaver sword (damaged) | Obtained by excavating Crucible stands debris; Obtained by completing Warforge Dig Site Site Research; Obtained by opening Ancient caskets. | --- | No | Yes | 
| Orkish claw component | A random drop while taking part in The Bird and the Beast event. | --- | No | No | 
| Orkish shield component | A random drop while taking part in The Bird and the Beast event. | --- | No | No | 
| Orkish throwing star component | A random drop while taking part in The Bird and the Beast event. | --- | No | No | 
| Orkish wand component | A random drop while taking part in The Bird and the Beast event. | --- | No | No | 
| Ornament | Player made (See Notes Section). | --- | Yes | Yes | 
| Ornate bowl | Player made (See Notes Section). | --- | No | Yes | 
| Orthen invitation | Appears in a player's inventory upon meeting the requirements. If they have no space in their inventory, then it appears the next time they do. | --- | No | Yes | 
| Orthenglass flask (damaged) | Obtained by excavating Experiment workbench; Obtained by completing Orthen Dig Site Site Research; Obtained by opening Ancient caskets. | --- | No | Yes | 
| Otot tablet | Player Made (See Notes). | --- | No | Yes | 
| Ourg megahitter (damaged) | Obtained by excavating Goblin trainee remains; Obtained by completing Warforge Dig Site Site Research and the Bandosian Special Research "Dwarven Forge"; Obtained by opening Ancient caskets. | --- | No | Yes | 
| Ourg tower/goblin cower shield (damaged) | Obtained by excavating Goblin trainee remains; Obtained by completing Warforge Dig Site Site Research; Obtained by opening Ancient caskets. | --- | No | Yes | 
| Ouroboros pouch | Obtained from the Temple Trekking noticeboard after raising Jayene Kliyn to level 99. | --- | No | Yes | 
| Overcooked rocks | Taken from the table next to where the wizards are sitting. | --- | No | No | 
| Overgrown cat | Player Made (See Notes). | --- | No | No | 
| Overgrown cat (purple) | Player Made (See Notes). | --- | No | No | 
| Overgrown hellcat | Player Made (See Notes). | --- | No | No | 
| Overload (1) | Player made (See Notes Section). | --- | No | Yes | 
| Overload (2) | Player made (See Notes Section). | --- | No | Yes | 
| Overload (3) | Player made (See Notes Section). | --- | No | Yes | 
| Overload (4) | Player made (See Notes Section). | --- | No | Yes | 
| Overload flask (1) | Player made (See notes section). | --- | No | Yes | 
| Overload flask (2) | Player made (See notes section). | --- | No | Yes | 
| Overload flask (3) | Player made (See notes section). | --- | No | Yes | 
| Overload flask (4) | Player made (See notes section). | --- | No | Yes | 
| Overload flask (5) | Player made (See notes section). | --- | No | Yes | 
| Overload flask (6) | Player made (See notes section). | --- | No | Yes | 
| Overload salve (1) | Player made (See Notes). | --- | No | Yes | 
| Overload salve (2) | Player made (See Notes). | --- | No | Yes | 
| Overload salve (3) | Player made (See Notes). | --- | No | Yes | 
| Overload salve (4) | Player made (See Notes). | --- | No | Yes | 
| Overload salve (5) | Player made (See Notes). | --- | No | Yes | 
| Overload salve (6) | Player made (See Notes). | --- | No | Yes | 
| Oxidised Kiteshield | Player made by using Ugthanki dung on a bronze kite shield in the heat of the desert sun. | --- | Yes | Yes |