Brilliance, Dispersion and Scintillation are three properties a well cut diamond exhibits. All three properties have to do with the way light interacts with a diamond. Light reflected off the diamonds is know as brilliance . Dispersion is the flashes of color in the diamonds as white light rays are separated into color. Also know as fire. Scintillation is the flashes of color when the diamond is moved back and forth.
Selecting your diamonds color. Diamonds come in every color of the rainbow. I am going to explain the color scale for a white diamonds, which is D thru Z. The whitest diamond would be the color scale letter D meaning pure white. The lower the letters go the more yellow tint you get in the white diamond. One way to save some money would be to go with a lower letter in the color scale but make sure the diamond has a strong blue fluorescence, which will make the diamonds appear whiter.