Copper is one of the most useful ores in the game (and real life). It's required in every Data & Analysis upgrade, which in total needs about 3,000 to completely upgrade. Copper is the only ore that is significantly more common the lower you are. It's uncommon in the first 2 layers (light and dark stone) then as common as iron in the 3rd layer of purple stone. Copper is also the main material for the Copper Plate.
- IRL, Copper is a reddish-brown chemical element with symbol Cu and atomic number 29 on the Periodic Table of the Elements.
- Gold, Iron and Silver also have symbols based off of Latin. Gold (#79) is Au, from Aurum. Iron (#26) is Fe, from Ferrum and Silver (#47) is Ag, from Argentum.
- It is a soft, malleable and ductile metal and is used to make jewelry, conduct heat and electricity, make coins (especially pennies in the US) and serve as a building material.
- Copper was the first type of metal ever used by us humans.