Diamond

Ironman verdict

At least 9 monsters drop it. The easiest is Goblin statue (level 70, 20/602); the best rate is Commander Zilyana (level 596), at 8/128, about one every 3 kills. You can also make it yourself: it takes 43 Crafting and gives 107.5 Crafting XP, using Uncut diamond. Other sources include Hero, Mystery box (random events), Magpie impling and Eclectic impling, plus 4 more listed below. Making ten takes 10 × Uncut diamond and gives 1,075 Crafting XP. Reaching level 43 Crafting takes 50,339 XP in total; the Crafting calculator counts the actions and materials to any target, and the Crafting guide has the Ironman training route. 9 recipes use Diamond, including Avian song-egg player, Diamond amulet (unstrung) and Diamond bolt tips. Diamond is available on free-to-play worlds too. 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 1,200 coins, which is 800 less than the shop price, so buying it to alch does not pay.