The planet's main exports are diamonds and related carbon-based minerals. Much of the planet's diamond is found in geologically unusual, cylinder-like veins, also known as "pillars" (generally only used for veins that extend above ground) or "wells". Many of the veins are controlled by the government, for on-planet use only. Some veins, however, are "occupied" by rebel and/or ICS commerce groups. Yet others are protected for conservation purposes. Other gemstones, such as rubies, are also plentiful on the planet, though few of them also form pillars.