4 CS Cut, Colour, Clarity, Carat
 

What you expect in a diamond.

 
The 4 'C's of diamonds are famous, the world over, as a precise, succinct and universal way to categorise diamonds and even help in gauging value. These 'C's, namely cut, colour, clarity and carat define the most important aspects of a diamond and allow a vast amount of quantification of data to be done regarding each individual piece.

This data goes on to define the diamond and aids in assigning its price. The 4 'C's are briefly explained below.

Of course, at BHC Diamonds, we're never content with simply offering you universal standards, we believe in going beyond. Our concept of the 8 'C's, an extension to the existing 4 is explained here.
 
Cut

The
perfect ratio of
surface to

volume.

ratio

 
The science of creating the facets of a diamond with symmetry and adding lustre to these facets to maximise the natural refulgence of a diamond. Besides shaping the stone, the perfect cut allows light to be reflected by the diamond in the best possible way.
Colour

Here,
colourless
implies

character.

character

 
The categorisation of a diamond based on the presence of visible tints of colour in it. As colour is not desirable in a diamond, the lower the hue and tint visible to the naked eye, the better the diamond is judged to be.
Clarity

Nothing
is

everything.

nothing

 
The art of grading a diamond based on the lack of blemishes and inclusions visible at a 10x level of magnification. A low number, or the total absence of blemishes and inclusions greatly increase the appeal and hence the value of the diamond.
Carat

Size means
nothing.
Weight

lends heft.

Weight

 
The method of measurement of a diamond based on its weight. Caratage is not a measure of size, as the perfect cut is what defines the lustre of a diamond, and sometimes a lower weight is acceptable, if it results in a perfectly cut stone.

Also, as the visible area of a diamond depends on the way it is displayed, caratage, or weight is a more precise yardstick.