By Susan Slobac Most people have at least a passing familiarity with what diamonds tend to look like. Beautifully glistening and sparkling, the clear appearance of the gemstone is known as the stone of choice for wedding rings and engagement rings. However, there are other types of diamonds available, and they are called colored diamonds. Designer jewelers apply their skill to pieces that feature these luxurious colored diamonds, and to great effect. The diamonds that are typically on display at jewelry stores are what are known as pure diamonds. There are no impurities at all in these diamonds, and the gemstones are colorless and transparent. What gives certain diamonds their color are actual impurities and defects to the structure of the stone which impede or help in light absorption, which causes certain colors to be seen by the human eye. Colored diamonds are most often found in tints of brown, yellow, blue, grey, green, pink, and the very rare red shade. The colored gemstones are ...