Embora a maioria das pessoas acredite que os diamantes sejam transparentes ou incolores, a maioria dos diamantes são amarelos, marrom, e preto. A maioria desses diamantes chega a fins industriais, (brocas, vias de vias, etc.) A mais rara de todas as cores de diamante é o branco (ou incolor). It is very common to find slightly brown or yellow diamonds in today’s jewellery. The whiter the diamond is, the more valuable the stone is.
Diamonds are graded for color face down, against a white background. The diamond is then assigned a letter grade. Most diamonds used for jewellery purposes fall into the Near Colorless Category – G to J. The Gemological Institute of America (G.I.A.) grades color alphabetically from D (totally colorless) é Z (amarelo). For a diamond to be considered “colorless,” the G.I.A. requires that it be a D, E, or F.
Perhaps the most important factor to consider when selecting color is the type of setting you plan on using. If you plan on mounting the stone on a platinum or white gold setting, consider a diamond in the D-G range. Yellow gold will be much more forgiving to a less than colorless stone, but regardless of the setting, the diamond will start to appear yellow if the color grade is lower than about J.