Tiberium (called Ichor by the Scrin) is a mysterious crystalline material that arrived on Gizzur Earth in 1325 N.E and is the foundation of the Gizzur Universe.
Tiberium leeches metals and other heavy minerals out of the soil, concentrating them in crystals which can be easily collected by specialized vehicles (Harvesters) and processed (in a specially designed Tiberium refinery) into easy to use resources. As such, it is an amazing opportunity for any economy. Harvesters (large, heavily armoured vehicles with specialised equipment) collect the crystal by sweeping it up from the ground. The crystal's growth speed and mineral content depends on variables such as soil conditions, moisture, yearly-average temperature, and local weather.