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Choosing the Right Diamond


An understanding of the four 'C's' may provide clearer information to help you chose and purchase your diamond with more confidence.

The four 'C's' are: Cut, Colour, Clarity and Carat-Weight


Cut


For a diamond to display its true brilliancy and sparkle (scintillation) the stone must be cut and polished in such a fashion that the facets allow the maximum amount of light entering the diamond to be internally reflected and refracted before being dispersed back through the upper face (table) of the stone.




Round

The round briliant cut diamond is by far the most popular choice of diamond shape at present.


Oval

The oval cut diamond may be considered as an elongated brilliant cut diamond. Traditionally it is set with two smaller diamonds to either side.


Princess

Is the most popular non-round diamond. It is a square or rectangular cut diamond with pointed corners.


Emerald

Emerald cut diamonds may be square or rectangular, but differ from Princess cut as the corners are tapered, and the pavillion (underside) has a faceted cut.


Asscher

The Asscher cut diamond is nearly identical to the Emerald cut except that it is square, with a total depth which is typically greater.


Radiant

A cross between a Round cut and an Emerald cut, the Radiant cut diamond is either square or rectangular in shape.


Marquise

Marquise cut diamonds are essentially twice as long as they are wide, with tapering points at either end.


Pear

These diamonds may be considered as a 'fusion' between Oval and Marquise cuts, with one border being rounded, and the other tapering to a point.


Colour


Diamonds are created naturally in a wide variation of colours, but it is generally accepted that, in the world of fine jewellery, diamonds in the 'white' range are the most sought after, with a colourless stone being the highest grade.


diamond cuts

The Gemological Institute of America (GIA) grades diamond body colour from D (colourless) to Z (light yellow):


Colourless:

D,E,F

Near Colourless:

G,H,I,J

Faint Yellow:

K,L,M

Very Light Yellow:

N,O,P,Q,R

Light Yellow:

S,T,U,V,W,X,Y,Z


The differences between these grades are incredibly subtle and take a trained eye to detect accurately!


Clarity


The clarity of a diamond is determined by the size, number and location of flaws or inclusions within the stone when viewed under 10x magnification.


diamond clarity

The GIA grades clarity from flawless to imperfect/included 3 (see chart above for pictorial representation).


FL:

Flawless

IF:

Internally Flawless, minor surface blemishes

VVS1 and VVS2:

Very Very Slightly Included

VS1 and VS2:

Very Slightly Included

SI1 and SI2:

Slightly Included

I1:

Included1

I2:

Included2

I3:

Included3


Carat-Weight


The 'weight' of a diamond is measured in carats. As the carat weight of a diamond increases, so does its rarity; this will be reflected in the price.


One carat is composed of 100 'points'.

For example a diamond of 60 points weighs 0.60 carat and a diamond of 250 points weighs 2.50 carats.


So, the cost of a diamond is not only dependant on the size (carat-weight) of the diamond, but also on the diamond's natural qualities of colour and clarity. Finally the craftsman's skill in achieving the optimum cut allows the true beauty of any diamond to be revealled.

 
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Andrew Campbell started trading in Antique Silver in the 1970's. Initially, Andrew lived in the South of England, travelling the country, searching for items of silver to buy. Andrew sold these items at various London markets and antique fairs. Over time, and through selling at a range of venues, Andrew built up a large and diverse customer base from private buyers to national and international trade customers.
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