It seems highly unlikely, given that it’s a magic material that is supposed to be strange and rare (found in meteors and rare mineral deposits). It certainly isn’t iron, but it doesn’t explicitly say if it is a pure substance or an alloy of some sort (which could have some iron). I don’t believe adamantine is a ferrous metal, though nothing says whether it is or is not.
I would think an adamantine weapon or shield would share this property. Adamantine armor is considered a magic item (it’s the first item in the DMG Magic Item List), so it should be safe. Is there any agreed upon benefit for adamantine shields in 5e? Although I don't have experience with 3e, Adamantine items in 3e were considered masterworks, would it be reasonable to use the 3e Masterwork system as a guide for an adamantine shield in 5e?Įdit: Just reread the Rust Monster statblock - it specifies “nonmagical weapon made of metal” or “nonmagical ferrous metal object”. Lastly, In 5e, Adamatine armor reduced critical hits to normal hits, and adamatine weapons default score criticals against objects. Is adamantine a ferrous metal? If adamantine is a unique, rare and precious metal it wouldn't contain iron, and thus wouldn't be affected by rust monsters. Is adamantine corroded by the oozes? If is is a naturally occuring metal, it seems it would be nonmagical and be affected by the oozes, based on the effect description in the monster's manual. WGtE references that adamantine is a rare metal found in meteroties or extraordinary mineral veins, so lore-wise it is a natural metal completely separate from Adamantium? I have found the reddit community to be a great help as I work to learn more about D&D, and I hope you can help me to understand better how adamantine items work in 5e. I am new to D&D, and this is my first post on reddit.