You get the diamond that Mother Nature provides. When you mine a big piece of rock, if you're lucky, you will find a marble-sized diamond. You would then take the stone to a diamond cutter. The expert will cut the largest and best possible quality diamond. The owner of the stone will typically listen to his cutter. The owner might be the expert on the final product but they wouldn't know the most valuable way to transform the stone. Once the stone is cut you can properly assess its color. There are a few exceptions but the color of stones is assessed on a scale that starts with D. D is the most desirable color and what is called colorless white. This is the diamond that most people what. Diamonds with a D color if compared against a white surface will not show any trace of color. If there is even a tint of yellow, the diamond will be in the E or F shade category. To the untrained eye, no difference will be detected until the diamonds goes down at least 5 grades: E, F, G, H, or I. By the time you get to J the shift in color will be quite obvious, even to the untrained eye. J, K, L, and M have a brownish-yellow tint. There is another classification of stones that occurs when a yellow diamond isn't turning brown. Professionals call this fancy yellow. Fancy yellow appears as a bright canary yellow. Stones of this variety, of pure yellow, blue, or pink, are some of the rarest and most expensive diamonds. We just handled and two-carat blue stone that ran for about $200,000.00. If you have anything like this don't hesitate to reach out. We love rare, exotic, and unusual diamonds.