Fendari ore

Fendari ore isn't so much mined as it is digested. The Fendari, a silicate species of wormlike creatures reaching up to twenty meters in length, burrow through mineral-rich deposits with dual rows of rotating teeth. After passing through the Fendari's digestive tract where impurities are removed, the ore that emerges at the other end is hardened, resilient, and keenly sought by shipbuilders for hull material.