The Diamond 4C's

Diamonds are not all equal. In fact, there are significant differences in quality and ultimately price.  To understand a diamond's value you must evaluate the diamond under the internationally recognised standards of the Diamonds 4C's:  Cut, Clarity, Colour and Carat. 

Cut

This does not refer to the overall shape of the diamond but rather the quality of the cutting.  It is the single most important aspect of any diamond.  The proportion, finish and symmetry of the external facets of the diamond are what creates the fire and brilliance.  A diamond may be colourless and flawless but if it is not cut well it will appear dull and lifeless.

Clarity

This refers to the amount and size of natural imperfections in the diamond.  This may be internal (inclusions) or external (blemishes).  The fewer inclusions in a diamond, the rarer and valuable the gem.

Colour

A diamonds colour is determined on a colour scale from D (colourless) to Z (yellow/brown).  The most sought after diamonds have no colour.  Whilst most diamonds appear to have no colour, in actual fact they have tints of colour as shown on a colour scale.

Carat

A diamonds weight is measured in carats, abbreviated ct.  One carat can be divided into 100 points.  Therefore, a diamond weighing one quarter of a carat can also be referred to as being 25 points.

What does this all mean?  When you are out searching for the diamond or diamond ring that you want, you need to take all of the above into account.  Its like comparing apples with apples, you will never find two the same.  Each diamond has its own signature,  so no two diamonds will be the same.  A 1.00ct diamond in one store is not going to be the same in another store which means they won't be the same price.