There are many factors involved when choosing a diamond and an expert diamond buyer will take into account a whole range of measurements and specifications when making his or her choice.
For most people; people who are not expert at buying and selecting diamonds, the assessment of a diamond comes down to four things only. These four factors are widely known as "The Four C's". In this section, we will just look at the "Colour" of the diamond.
You may have heard people refer to diamonds as "white", but in actual fact, a diamond is graded on its lack of colour; the less colour the better.
Many people will be unable to tell the difference between several grades as the differences and slight differences in colour are so subtle that they are invisible to the untrained eye; however, these distinctions, which any good jeweller or expert diamond-buyer will be able to discern, make a very significant difference in diamond quality and price.
Diamonds are graded alphabetically, starting at D for the best, colourless diamond to Z, which is an obvious light yellow colour. There is a big difference between a "white" Z-coloured diamond and a natural fancy coloured yellow diamond, both in appearance and value.
Natural fancy coloured diamonds are exceptionally rare and so command big prices. The colours can range from beautiful bright yellows to deep pinks and blues and everything in between. The most sought after are the fancy intense yellows, fancy pinks and fancy blues.