Diamond Mining – How are diamonds mined and formed?

>>>>>>Diamond Mining – How are diamonds mined and formed?

Diamond Mining – How are diamonds mined and formed?

Approximately 130,000,000 carats (26,000 kg) of diamonds are mined annually, with a total value of nearly US$9 billion, and about 100,000 kg (220,000 lb) are synthesized annually.

Only a very small fraction of the diamond ore consists of actual diamonds. The ore is crushed, during which care is required not to destroy larger diamonds, and then sorted by density. Today, diamonds are located in the diamond-rich density fraction with the help of X-ray fluorescence, after which the final sorting steps are done by hand. Before the use of X-rays became commonplace, the separation was done with grease belts; diamonds have a stronger tendency to stick to grease than the other minerals in the ore.


By | 2018-04-02T12:42:56+00:00 April 3rd, 2018|Categories: Atividades de Inglês, Extended ESLs|

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Cursos de Inglês como Segundo Idioma [ESL] para pessoas interessadas em dominar o idioma em tempo recorde e de forma definitiva. Através de ferramentas tecnológicas de ponta e conteúdo intensivo, a MSR Maestro auxilia todos no domínio do idioma Inglês.