Silva Vinh. Diamonds. May 01st , 2017.
A 0.5-2 carat diamond is usually considered the best to make stud earrings. A bigger diamond can sag the earlobe. Secondly, the cut of the diamond is also very important. The brilliant cut is common yet very popular even today. On the other hand, you can also go for the princess cut as it is the latest fashion. A smaller diamond can be set in 2-4 prongs while a larger one in 4-6 ones. The overall price of diamond earrings depends on the carat, cut of the diamond, and also the metal used.
✦ This was the first success in Russia for the search of kimberlite after various failed expeditions in the 1940s and 1950s. In 1957, Yuri Khabardin was given one of the prestigious awards in the Soviet Union -- the Lenin Prize -- for his discovery.
Even the role of coal in diamond formation due to subduction of tectonic plates is negated with the theory that subduction mainly happens in oceanic plates, as compared to continental ones. It is contended that in case of oceanic plates, the main sources of carbon are limestone, dolomite and marble. Plant debris is found in meager amounts only.
Special sea vessels with drilling, extraction, and processing facilities are built, that carry out this operation. The sea floor is probed for diamond deposits by specialized seabed crawlers, which employ hoses to lift up pay dirt. The seabed is also drilled, to access diamond rich gravel. The extracted gravel is airlifted to the coast for further processing. De Beers is the leader in global operations of this kind, with operational vessels off the coast of Namibia.
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