Today the popular trend points towards colored diamonds. Lesser quality diamonds have been treated to make them beautiful and affordable for the average consumer. The diamonds are processed with irradiation and strong heat. This will take a brown or yellow diamond of a poor quality and produce a lovely colored diamond. And the best part is that they are affordable. Through this process the diamonds can turn a stunning shade of green, blue, red, purple, yellow and many varieties of colors. They will most likely retain their color over time, but if there is a need for repair using a high heat the color may change.