Diamond color grades range from D for the “whitest” diamonds to Z for diamonds that have a heavy colored tint to them (usually yellow or brown).
We only carry colorless (D – F), near colorless (G – J), and K color diamonds since these are the only color grades we’d recommend purchasing (Tiffany
& Co. shows D – I if you want to be a bit more stringent).
Fun fact, the color grading system starts at D because prior to the GIA there was another grading agency that graded color on a scale from A to
C (with pluses and minuses like your school report card) so the GIA decided to mix things up and start at D. The more you know…