“DIAMONDS ARE MADE FROM COAL”
It is often thought that diamonds form from the compression of coal, but these beautiful gems originate from a deeper geology. The confusion comes from their similarly high content of carbon. Both diamonds and coal are made of carbon, but they form in different layers within the Earth.
Diamonds form in the Earth’s mantle, around 145 kilometres below the surface. At temperatures of around 1,050 degrees Celsius, diamonds form from carbon under the immense pressure of the
Earth’s mantle. Ejected via volcanic eruptions, diamonds are pushed to the surface, hitching a ride on a magma channel rising from the mantle. Diamonds have also been known to come from the subduction zone, where an oceanic plate collides with a continental plate, forcing the oceanic plate underneath its continental counterpart. This process occurs at a lower temperature and pressure, so smaller diamonds are formed.
On the other hand, as a sedimentary rock, coal is the product of the decomposition of natural materials such as sea life and plant material. Coal is formed much higher up in the mantle, and is rarely buried to depths greater than 3.2 kilometres. Though it would make a great rags to riches story, in the case of diamonds, it’s riches all the way. Once cut and polished, diamonds present their unique sparkle
The word ‘diamond’ is derived from the Greek word ‘adamas’, meaning invincible or indestructible Strong bonds Each carbon atom inside a diamond is covalently bonded to four other carbon atoms. Under pressure Created under intense pressure and heat, diamonds are the hardest natural mineral.