Tin Ore

Tin Ore naturally spawns as an alternative to the Copper Ore in some worlds. Tin ore can be crafted into Tin Bars. Each bar requires 3 ore. The bars can then be used to create tin tools and armor, amongst other things. As all the other replacement ores, it is identical to copper, except for its appearance. The hardmode ore that will spawn in your world when you have Tin will be Cobalt.