This paper deals with gold, which is described as a chemical element. Special attention is paid to its physical-chemical properties and, furthermore, where or in what form it can be found in nature. ...In addition, we discuss the role it has played through history and how progressive banking has developed through its discovery (from gold coins to its value in paper form). As long ago, gold is still a synonym for prestige, which can be seen in the wearing of gold ornaments and the commodities business. Often it happens that people do not actually know what gives gold and golden products their present value. Therefore it is good, from time to time, that contributions such as this appear, that remind or inform people how gold has been developed through history so that it has reached today's value, and what its base characteristics are which enable us to harden it (by adding other appropriate elements) and then to form it into desired products (rings, necklaces). It is important that we know that gold is also used in industry in many engineering applications (contacts in microelectronics) and medicine (dental alloys, implants). Still more, when gold is broken into nanoparticles it can break in many different ways, depending on the process. It was found that such particles could be in an assortment of shapes including rods, cubes, cap-shaped pieces, and spheres. Gold nanoparticles are therefore highly useful for a wide range of processes, including general nanotechnology, electronics manufacturing and the synthesizing of rare materials. But, at the end, we need to know that gold is a very rare element in the Earth's crust and its stocks are today already very limited. Because of this, we need to be aware of its value as a product and raw material.
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