Diamonds are one of the hardest naturally forming materials on Earth. They received the name from the ancient Greek word ‘adamas’ which basically translates to “unbreakable”.
The formation of a diamond requires very specific conditions that can only be found in two places on earth. Those being the Earth’s crust and at the site of a meteor strike.
A diamond is composed of materials from the Earth’s crust and uppermost mantle and can only be formed when the temperature of the Earth is at a certain degree and enough pressure exists. The outer layers of a diamond are not comparable to a stone ready to be set. The process to refine a diamond requires much time, precision and dedication.
Thanks to deep-origin volcanic eruptions, people discovered diamonds. Since they are deeply rooted in the Earth’s crust (in the ancient, thick and stable parts of continental plates), they are a relatively rare occurrence. Diamonds are carried to the Earth's surface with a volcanic eruption. Oftentimes erosion occurs to the rock and diamonds are discovered - ready to be shaped into the form of the world’s most precious stone.
Finally, one of the most interesting things to know about diamonds is that not all of them originate on Earth. One type of diamond known as ‘carbonado’ is believed to have been deposited via an asteroid that hit the Earth about three billion years ago. This specific diamond has been found in Africa and South America - but many believe that it was formed in outer space before the asteroid hit the Earth. Diamonds can also occur in high-pressure conditions such as meteor or meteorite impacts.