The diamond is a natural crystalline carbon that is characterized as the hardest mineral known. It comes from the depths of the earth, where pressures and temperatures make crystal formation possible from coal. Due to the volcanic activity, the diamonds come out closer to the surface, where they can be collected as mining activity.
It is very valuable, due to its relative scarcity and the subjective appreciation we make of this stone as a society.
The value of this stone comes from very early in the history of man. Since the nineteenth century it has become popular in the world as a jewel, due to marketing, improvements in supplies, techniques of worked as a precious stone, economic growth, etc.