Copper

A non-ferrous metal, copper is one of the few pure metals found in nature. As such, it is the earliest metal ever used by humans. First used in 8,000 BS, it was later the first metal to be cast into a shape in a mould in 5,000 BC, and then in 4,000 it was the first metal to be purposefully alloyed with another metal - tin - which led to the creation of bronze in 3,500 BC.

It goes without saying, then, that copper is one of man's oldest metaphorical companions. One of its most desirable features is its very high electrical and thermal conductivity, which has led it and its alloys to become commonly used in cables, hardware, and many other things that rely on conductivity. Aside from that, due to its softness and distinct colour, it has been used in jewellery for decorative purposes, as well as various coins worldwide.