Diamonds are created between 75-120 miles below the earth's surface. The first delivery of diamonds was about 2.5 billion years ago accordingly to geologists, the most current batch was about 45 millions years ago.
From the melting of the pre-existing rocks in the Earth's upper mantle, carbon is produced. The abundant carbon atoms in the mantle are forced to go deeper due to the temperature changes. From there it melts and finally become the new rock at a lower temperature. The carbon atom in the melting crystal rock will bond to build diamond crystals when the other conditions such as pressure and chemistry are right.
At this stage, if the temperature rises or the pressure drops, the diamond crystals may partially or totally dissolve. It is still not guaranteed that these carbon atoms will turn into diamonds. If they do form, it will take thousands of years before these diamonds appear anywhere near the Earth's surface.
A diamond comes from the bosom of the earth and it takes million of years just to produce one. Not all diamonds that were mined can be made into jewelry. Only one quarter of the diamonds mine are made into jewelry as every 100 tones of mud produces only one carat of a diamond. A one carat diamond is not one stone, it can be anything from 0.005 ct to 1 ct as much of the original stone is cut away in the process of cutting, shaping and polishing the diamond. So when you own a diamond, you own something that is truly legendary, not something that was just made in factory the other day.
Diamonds come in many rough shapes and sizes. After reading through the article, the next time you look at your diamond, consider the amount of time, energy and resources that have gone into making that one.
To summarized, having an understanding of how a diamond is made gives you a better appreciation of the diamond's value. (http://www.MyLovelyDiamonds.com)
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