Copper

is a Tier I base metal in the pre-alpha version. Copper is part of different alloys. From two pieces of Copper one can produce Pure Copper.

Alloys

 * Bronze - from Copper and Tin
 * Electrum - from Copper, Silver and Gold
 * Sterling - from Copper and Silver
 * Rose Gold - from Copper and Gold
 * Crown Gold - from Copper and two gold pieces