Diamonds are the hardest, most robust and brilliant of all precious stones. The word 'diamond' comes from the Greek word 'Adamas', which means unconquerable, referring to its hardness. Diamonds are transparent gems composed of carbon and are the hardest natural substance in the world. In addition to this, they also have the highest thermal conductivity of 20-25 W/cmK, which is 5 times more then copper. Diamonds in its most pure form are colourless, although some may contain traces of Boron or nitrogen, which in combination give it different colours such as yellow, blue, green and black. …
