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.
Diamond Color. The most widely accepted diamond color grading scale is the D-Z scale of the GIA Diamond Grading Laboratory. D is colorless, and the scale continues with increasing color down to Z. The scale defines near colorless down to K.. Diamond Cut quality significantly affects face up color, as the better the cut, the more light refracts up through the top of the diamond to your eye, and thus the whiter the diamond will face up.