The category with the highest number of workers in 2011 comprised the 21.4 million office and administrative support occupations, which had average earnings of $2,843 per month, $34,120 per year or $16.40 per hour.n 2011, food preparation and serving related occupations were the lowest-earning category, earning an average monthly $1,785, which equaled $21,430 per year, or $10.30 per hour.
Blue diamonds are extremely rare. They generally have a slight hint of gray, so theyâre rarely as highly saturated as blue sapphires. Their color is caused by the presence of boron impuritiesâthe more boron, the deeper the blue. Fancy green diamonds are typically light in tone and low in saturation.
Synthetic diamonds of various colors grown by the high-pressure high-temperature technique. Synthetic diamond (also known as cultured diamond or cultivated diamond) is diamond produced in an artificial process, as opposed to natural diamonds, which are created by geological processes.or economic reasons, the growth of most synthetic diamonds is terminated when they reach a mass of 1 carat (200 mg) to 1.5 carats (300 mg). In the 1950s, research started in the Soviet Union and the US on the growth of diamond by pyrolysis of hydrocarbon gases at the relatively low temperature of 800 Â°C.