...If only it was possible to create a forgery of this medal... but it might cause trouble with the adventurer's guild.
Attached to the chain was a bronze medal which served as his identification plate. This plate could be used to judge an adventurer’s ability.
Copper, Iron, Silver, Platinum, Mithril, Orichalcum and Adamantium.
These metals are used to rank adventurers, with copper being the lowest and adamantium the highest ranking metal. Higher ranking adventurers can choose harder jobs which offer greater rewards. This system was established to prevent adventurers from losing their life in vain.