Platinum occurs naturally, albeit in small quantities, in the Earth's crust at about 0.000037 parts per million. One of the rarest precious metals, the world's supply of platinum is obtained as a byproduct of nickel and copper mining and production, because platinum occurs in nickel and copper ores. Pure platinum that is found in placer deposits and other ores, on the other hand, is extracted using a variety of methods.
Its rarity and very high resistance to corrosion makes platinum a prized base precious metal for jewelry. While it has often been mistaken for silver in the past, it does not tarnish and just like gold, it does not wear out. While it has less sheen compared to gold, its higher value makes it a valued symbol of prestige.
Although platinum is best known for its use in jewelry, most of the world's production of the precious metal is used in various industries. About half of the world's yearly production of platinum is used as catalytic converters in automobiles, converting harmful and toxic emissions into less harmful waste products. Apart from catalytic converters, platinum is also used in computer hard drives, optic fibers, dental fillings, spark plugs, turbine blades and LCD screens.