A Chaldian Shining Stone is a white crystal, usually about a handsbreadth long, which emits a strong white light. When freshly unearthed such a stone will light a normal room, but it rapidly becomes dimmer, dying out after about six months. These Crystals are in great demand for lighting the homes of nobles.
While any miner can extract the stones from the ground, a Stonetalker is required to locate new seams. They can do this near Chald if they have Mining 2 and can succeed in an identification roll resisted by a 20 (see Stonetalker rules).