An Adamant helm (h4) is a helmet obtained from the Level 2 Treasure Trails or bought from other players. It cannot be made using the Smithing skill. Players wear it for its unique design.
It has stats identical to that of an adamant full helm, the only differences being that the helm is more expensive, has a different appearance, cannot be smithed and can only be obtained through Treasure Trails. There are also four other heraldic helms made of adamant, each having a different heraldic design. There are also heraldic helms in rune and black with the same designs.