Diamonds - General - Does size matter when I’m buying a coloured diamond?
Yes and no. Size is only part of the pricing equation. As explained above, when you are purchasing a natural fancy coloured diamond, you must consider the “four C’s”: Clarity, Colour, Cut and Carat weight.
While coloured diamonds are rare, some are even rarer than others. For example, a 1/2 carat fancy intense pink VS1 diamond is equal in price to a 4 carat fancy yellow IF diamond. This is because pinks are rarer than yellows and fetch higher premiums, even though they are smaller and of lesser clarity.