Adamant Armor

Adamant Armor Full Helm
Can be bought from the barbarian village helm store

Can be made with 77 smithing

Adamant Armor Platebody
is a drop from bronze dragons

Can be made with 88 smithing

Adamant Armor Platelegs
can be bought in al kharid plateleg shop

Can be maded with 86 smithing

Adamant Armor Kiteshield
can drop from steel dragon

Can be made with 82 smithing