Can Real Diamonds Be Colored. Nitrogen makes a yellow diamond. Therefore when certain chemicals are found in the crystalline structure of a diamond they produce a colored diamond.
Colors produced range from green vivid yellow blue purple red and sometimes pink. Thus the more color a stone has yellow or brown the lower the grade. Robert Crowningshield one of the pioneers of GIAs research on diamonds and vice president of GIA for many years beginning in 1950 was able to examine some of GEs man-made diamonds in 1970.
All diamonds graded by the GIA or other grading entities receive a color grade between D the highest grade meaning nearly colorless to Z visibly yellow.
A touch of boron makes a blue diamond. The colors of natural diamonds are also more saturated than that of moissanite stones which tend to appear to change colors as it disperses light throughout the gem. Just like other colored diamonds red diamonds can contain secondary colors. Coated diamonds can be damaged by heat and chemicals during jewelry repairs and polishing.
