Tetrahedrite is a form of copper ore and is one of the most common ores in the game. Tetrahedrite rocks on the surface will be the most common source of metal for players moving from stone age to copper age.
Tetrahedrite spawns as small rocks on the surface, indicating a vein somewhere below.
Tetrahedrite veins are medium in size and can be found in metamorphic layers of stone:
Tetrahedrite veins can also be found in the top half of the top layer of stone.