Does it matter under what light I view a diamond?
When purchasing your diamond you should actually see it under several different light sources. When you are buying a diamond and you are trying to determine that what you're looking at is the actual colour that you are being told it is, there is a very specific type of light which is a laboratory light that bleaches out all other colour and lets you see the true colour. However, before you make that final decision you should be able to view that diamond under natural sunlight because that is how she's going to see it everyday for the rest of her life. If that diamond sparkles and dazzles your eye then that's how you make your choice, so you should be able to see your diamond under different types of light.