A lapis lazuli gem is obtained from mining copper rocks or tin rocks with a dwarven army axe, and then cutting the uncut lapis lazuli with the dwarven army axe or a chisel.
It can be used with Unfinished wooden brooch to create a lapis lazuli brooch. Combining the brooch and the stone grants the player 30 crafting experience. Alternatively, it can be smelted with a silver bar at level 11 Crafting, making a lapis lazuli ring grants 38 crafting experience, and the ring can be enchanted into a ring of luck.
Tobias Bronzearms, found outside of the Taverley mine, will buy this off players for 150 coins and sell it for 500 coins.
- Prior to the luck rework update, the examine text just was "Combine this with a setting from cutting trees with your Army Axe."