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.
How are diamonds Colored? In the above section we covered all of the reasons for natural colored diamonds. However, in recent years with the rise of popularity and demand for those diamonds, and with it the rise in their prices, the market for treated and color enhanced diamonds has evolved tremendously.