The Fire altar is a runecrafting altar located north of Al Kharid just west of the Duel Arena. It is used to craft fire runes from rune essence or pure essence, granting 7 experience each.
As with most runecrafting altars, it can be accessed via the Abyss. Players could also enter its ruins by using a fire talisman or by wearing a fire tiara.
Crafting fire runes with a ring of dueling is one of the fastest ways to 44 Runecraft. With duel ring teleports, the average round-trip time if walking to the fire altar is ~35 seconds if minimising game tick loss (i.e. teleporting right after the animation finishes). This allows for ~20,000 experience an hour. If running to the altar + teleports, one can expect ~27,000 experience an hour, if minimising tick loss. The average round-trip time in this case is ~26 seconds.
It is possible to make Steam runes, Smoke runes, and Lava runes while at this altar, but at a 50% success rate. This will result in less runes than normal being made. To make a combination rune, the player needs one set of elemental runes, a stack of pure essence, and 2 talismans.
Note that you need to use the opposing rune on the altar to craft combination runes. Simply clicking on the altar would just result in regular elemental runes.
Magic Imbue negates the need of a talisman.
If the player equips a binding necklace, the success rate will increase to 100%. The necklace has a total of 16 uses before breaking. A charge is used each time a batch of combination runes is crafted, instead of each time the altar is entered or for each rune crafted.
A fire tiara may be created at this altar by having a fire talisman and a normal tiara in your inventory. The player must use the tiara on the altar. Doing so will earn 35 Runecraft experience.