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 …showed first 75 words of 1617 total…

…showed last 75 words of 1617 total…and ship building. Very thin diamond impregnated saw blades are used to slice brittle metals and crystals for use in electronics. Knives in the home can be sharpened using 'steels' impregnated with diamond powder. Diamonds are an extremely useful and valuable resource because of its hardness which allows it to be used in many different ways. They are used as decorations, charms, gifts and in marriage because of their attractiveness to the eye which is