When it comes to the term shocking yellow, the canary diamond engagement rings are the cream of the crop. Why? Well, it’s because the canary diamonds are stunningly, shockingly, and piercingly yellow. In the diamond world, there is this special class in which colored diamonds are typically named fancy-colored diamonds. While the common diamonds are transparent or colorless, those diamonds of yellow color categorized fancy, denoting the ‘unexpected’ discoloration due to involvement of impurities or any other factors. Yellow-colored diamonds indeed do exist in nature, but rare. So rare are these diamonds they merely make for 0.1% of the total amount of diamonds known to occur naturally. Due to this nature of rarity, humans then try to find another way to treat a diamond into becoming one that suits their tastes. In this case, some diamonds of certain colors are heated to the point where their color turns yellow. So, based on this point of view, we can determine whether or not certain canary diamond engagement rings are expensive. Natural canary diamond rings are commonly higher in price when compared to the others using synthetically-made canary diamond. In fact, most of canary diamonds sold on the market today are treated varieties so there are less number of natural ones. Diamonds are divided into two bigger class based on the presence of impurities within a diamond and how these impurities influence the way that diamond absorbs and reflects light. Canary diamonds find their place on Type I, whose members all have capabilities to absorb ultraviolet and infrared. Gemological Institute of America provides data and information as well as guide for you to know whether canary diamond engagement rings are natural or synthetic.