A ring of forging can be made by enchanting a ruby ring, using the spell Lvl-3 Enchant. If a player smelts iron ore while wearing the ring, it gives a 100% success rate. However, after smelting 140 iron ores while wearing it, the ring disintegrates. The number of charges is specific to the player, not the ring. When reaching 140 smelts, the ring you are currently wearing will disintegrate. This means switching, trading, or alching rings before 140 charges will not reset the number of smelts you have left before a ring breaks and is therefore not recommended. NOTE: When using the Edgeville furnace while wearing Varrock Armour with Ring of Forging, there is a chance to smelt 2 bars at once. The ring's durability will only decrease by 1, meaning you smelt one bar for free.