Jet (meaning): It is of black color. It is supposed to cure snake bites. It was mined in U.K. in 1500 B.C. It is a very hard variety of coal. It is an expensive gemstone and has a dull luster on broken surfaces. It is associated with magical and mystic powers. It is generally worn around the neck in the form of rosary prepared from small round heads of the gemstone. It can be effective in countering ailments pertaining to functional health of ladies and gynecological problems.