Beljuril

Beljuril is a gemstone unique to the Realms. They are a deep seawater green and all known specimens are roughly the size of a human fist and not quite spherical. About once every hour (rates vary from stone to stone) a beljuril will absorb an undetectable amount of energy from within a thirty foot (ten meter) radius and re-emit that energy as a "flash"(known as fireflashils ) of sparkling light without heat, sound, or electrical discharge. The light produced is easily noticeable when the ambient light is dim (candlelight or lantern light) and in the dark it is dazzling to the eye. Beljurils are very difficult to cut with metal tools and the stone is very durable. They are sometimes claw-mounted to shoulder-plates or worn in a pectoral, or used as decorative lighting or beacons by the wealthy. They are found in ancient rock, usually blue claystone.