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Diamonds Explained

Diamonds Explained


When selecting your perfect diamond you need to consider four special characteristics of the stone – Cut, Colour, Clarity and Carat Weight. See more.


The cut of a diamond determines its sparkle, or brilliance. Out of the 4 Cs, the cut is the most important influencer of how beautiful a diamond is. A poor or even average cut can make a diamond look dull and lifeless. We only sell the top grades of cuts for all our diamonds.


Ideal The ideal cut diamond is a rare cut with excellent symmetry where all light that enters the diamond is reflected from the top to ensure the highest brilliance. A diamond cut that will dazzle for a lifetime.

Excellent This superb cut is the second highest cut standard available. Nearly all light in this exquisite cut is reflected from the top of the diamond for a brilliant result.

Very good While not considered perfect in cut, it could be just the perfect diamond for you. There is minimal difference to the leading grades with most light still reflected from the top producing a brilliant diamond.

Good While the sparkle may not be as dramatic as the top grades, diamonds at this level can be a wise choice. Spend more budget on diamond carat weight for a bigger, more dazzling diamond.

Fair Imperfectly cut diamonds that lose light and are noticeably duller. (*Not stocked by Diamond Exchanged)

Poor These diamonds are either cut too shallow or deep and lose their light. (*Not stocked by Diamond Exchange)


The one thing to remember is, a colourless diamond is higher in value than a more colourful one.  At Diamond Exchange, we only carry diamonds within the highest grades of the colour grading system.

Diamond Colour Grades

D Colourless. Be captivated by a D coloured diamond, the most perfect of all. Completely colourless, these spectacular diamonds are the highest grade in diamonds. Similar in tint to a bright white, diamonds of this quality are extremely rare and a diamond you will treasure forever.

E Colourless. The second most impressive grade, the E coloured diamond offers the magical sparkle of a high quality diamond that is completely colourless to the naked eye and close to white. Only a trained gemmologist can detect the colour, but you'll simply see its remarkable beauty.

F Colourless. The F grade of colour may sit at the bottom of the colourless grade, but it simply cannot be detected by the unaided eye. They will look stunning on your white gold, gold or platinum engagement ring. Along with G it is the most popular colour grade.

G Near Colourless. It's not surprising the G grade is one of the most popular diamonds for those looking for an exquisite diamond that offers both beauty and value. Colour can only be detected by a trained gemologist, but the sparkle of this precious gemstone will look spectacular in a white gold or gold setting.

H Near Colourless. H Grade diamonds are dazzling, near colourless stones that have some colour but only evident to a genuine gemmologist and certainly not to the naked eye. This elegant grade will create an elegant match with your choice of white gold or gold setting.

I Near Colourless. While not completely colourless and slightly detectable to the naked eye, I colour diamonds offer value for money that can be as dazzling as the diamond itself. A shrewd choice, these unique diamonds are a perfect fit for a stunning gold or rose gold setting.

J Near colourless. J colour diamonds are a stunningly smart selection and often better value than than higher grades. These near colourless diamonds remain undetectable to the untrained eye but their sparkle will look quite spectacular matched to yellow or rose gold.

K-M This level of diamond has noticeable colour that is detectable to the naked eye. (*Diamond Exchange do not stock)

N-Z The poorest level of colour grade being strong, easily detectable colour. (*Diamond Exchange do not stock)


Every diamond comes with its own natural marks or imperfections, known as inclusions. No two diamonds have the same inclusions, so the clarity of a diamond is what makes each one truly unique. The fewer inclusions a diamond has, the rarer and more valuable it is.

Diamond Clarity Grades

FL Flawless - As the name suggests these diamond are literally flawless with no inclusions internally or externally. They are celebrate your love for a lifetime.

IF Internally Flawless - Superb diamonds with no internal flaws and possible surface blemishes. This clarity grade is very rare and highly valuable to seal your life together.

VVS1 Very, Very Slightly Included VVSI - A very, very fine choice. High quality with some minute imperfections not visible to the unaided eye and just visible at 10x magnification.

VVS2 Very, Very Slightly Included VVS2 - A beautiful diamond for your perfect engagement ring. There's slightly more significant inclusions than a VVSI grade, but still hidden to the untrained eye.

VS1 Very Slightly Included VSI: A stunning diamond that's less expensive to suit your budget. Very good quality with any imperfections still unable to be seen by the untrained person.

VS2 Very Slightly Included VSI2 - Another gorgeous diamond at exceptional value. More inclusions than VSI, but invisible to the naked eye, this is one of the leading clarity grades.

SI1 Slightly included SI1 - Highly sought after for beauty and value, flaws are only visible under light magnification, but not the naked eye. All you will see is a magical diamond.

SI2 Slightly Included SI2 - Inclusions at this level of clarity can be seen under slight magnification but S1 diamonds still give you the best value diamond to last forever.

l1 Included I1 - Lesser quality diamonds with obvious imperfections under 10x magnification. Depending on specific inclusions, the durability can be compromised. (*Diamond Exchange do not stock)

l2 Included I2 - The lowest clarity grade where imperfections can be seen clearly within the diamond and on the surface. (*Diamond Exchange do not stock)


A carat is the standard measurement of a diamond’s weight, as well as an indication of the size of the diamond. Large diamonds are much rarer than small ones, so the value of a diamond rises in proportion to its carat weight. 


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