2. What is tugsten used for?

Because of its hardness and wear resistance, its most common uses are in hardening steel, and for making drill tips and cutting equipment.  It is therefore used throughout the mining, metalworking, petroleum, construction, military and jewellery industries. It is a critical component of engine valves, ball-pint pen tips, tungsten filaments in light bulbs, turbine blades, LCD panels, TV tubes, laser printers, window heating wires, car horns, electrical switch gear, airplane flaps, and is even used in golf clubs. It is also used in the vibrating mechanism of mobile phones, used in the manufacture of specific steels for jet engines, medical and dental equipment and high-temperature resistant alloys. It is a high tech metal essential for all developed economies.