Well, the Forge has four different types of metalsmiths:
Blacksmiths, who work with iron, steel, and all manner of heavy metals to make things that are functional and sturdyWhitesmiths, who work with silver to create beautiful pieces, be they artwork or weaponryRedsmiths, who work with copper and brass, and who tend to incorporate mechanical elements into their creationsYellowsmiths, who work with gold and are very precise when they craft
In addition to those smiths, our member tiers are all based on metals:
Bronze | Iron | Silver | Gold | Platinum | Obsidian |
Cobalt | Mythril | Orichalcum | Adamantite | Titanium | Netherite |
(This whole question roughly translates to, "Hey, here's some ideas for metals to incorporate into your entry. Hope it helps.")