People have known the existing of tungsten for 300 years. Tungsten has classically been a very valuable metal, since its strength and durability make it extremely useful for industrial uses. One of the most famous uses of tungsten is as wear-resistant tools. While tungsten tools can be expensive, many workers like them because their durability and long lifetimes. For the jewelry market, tungsten become the popular jewelry such as tungsten earring, tungsten neckage and also "tungsten rings".