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Anything extremely rare is also precious. Diamonds formed billions of years ago are rare in that only a few survived the hazardous journey from the depths of the Earth to reach the surface. Indeed, you may be surprised to learn that even though diamond production has increased in recent years, it is estimated that as little as 500 tons have ever been mined in recorded history to date. Of diamonds mined today, approximately 50% are judged to be of gem quality. Even fewer are large enough to be polished into diamonds that are much bigger than the headof a match.
To recover the relatively small amount of both gem quality and industrial diamonds in not easy, even with the increasing sophistication of today's technology. Approximately 250 tons of ore must be mined and processed from the average Kimberlite pipe in order to produce a once carat polished diamond of gem quality. Wherever possible, the considerable quantity of waste material produced is disposed in such a way as to minimize the impact on the local environment.
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