Dragonstone

Ironman verdict

2 monsters drop it. The easiest is Hydrix dragon (level 133, 8/128); the best rate is The Magister (level 899), at 8/128, about one every 2 kills. You can also make it yourself: it takes 55 Crafting and gives 137.5 Crafting XP, using Uncut dragonstone. Other sources include Dragon impling, Dragon impling jar, Kingly impling and Kingly impling jar. Making ten takes 10 × Uncut dragonstone and gives 1,375 Crafting XP. Reaching level 55 Crafting takes 166,636 XP in total; the Crafting calculator counts the actions and materials to any target, and the Crafting guide has the Ironman training route. 18 recipes use Dragonstone, including Crushed dragonstone, Dragonstone amulet (unstrung) and Dragonstone bolt tips. Dragonstone is members-only. It is tradeable on normal accounts, but an Ironman cannot use the Grand Exchange or trade for it, so the sources on this page are the whole list. High Alchemy turns one into 6,000 coins, which is 4,000 less than the shop price, so buying it to alch does not pay.