Iron ore is unrefined iron. A player with a Mining level of 15 or higher can mine iron ore from iron ore rocks, granting 35 Mining experience each. Iron ore's respawn times differ according to the number of players within a world; on average one respawn takes 10 seconds. It can be used with level 16 Summoning, 7 spirit shards, and 1 gold charm to summon a granite crab. The noted form is a possible reward from Temple Trekking and can sometimes be found inside barrels.
Players with 15 Smithing can smelt iron ore into an iron bar by using it on a furnace, granting 12.5 Smithing experience. At level 15, there is a 50% chance of success (-240 profit), increasing by 1% per level, maxing out at 80% at level 45 (45 profit). Wearing a ring of forging (131.99 profit) or using the Superheat Item spell (-625 profit) ensures 100% success. Note: A ring of forging only lasts for 140 smelts.
At 30+ smithing, players can also smelt an iron ore into a steel bar by using it on a furnace along with 2 coal (-192 profit), or just 1 when using the Blast Furnace (207 profit), granting 17.5 Smithing experience.