The 4Cs of Diamond Quality
The 4Cs of diamond quality were established by internationally renowned leader in gem education, research and laboratory services, GIA. GIA is a non profit organisation and this universal standard of diamond quality was created to help the consumer understand exactly what they are buying.
Each of the 4Cs: COLOUR, CLARITY, CUT and CARAT WEIGHT represents a different aspect of diamond quality. The sliding scales below allow you to compare the difference between different gradings within each of the 4Cs.
Each one of our GIA graded diamonds is independently evaluated by multiple graders and isn't given a colour grade until there is consensus on the grade. GIA graders use standardised environments and master diamond sets to ensure every grader objectively and accurately assign a colour grade.
The GIA colour scale (shown below) starts at D, representing a colourless diamond, and ends at Z. Diamonds at the lowest end of the scale will have a noticeable yellow or brown tint, but are not fancy colour diamonds.
To us, colour is one of the most characteristic features of a diamond and one that is easily visible to the untrained eye. That's why we only stock diamonds falling within the colourless range, emitting a beautiful, clean bright white.
The clarity of a diamond refers to the presence if internal inclusions or surface blemishes. GIA's Clarity Scale has six main categories, ranging from Flawless to Included.
Diamond clarity is graded under standardised viewing conditions under 10x magnification. The grade assigned to the diamond will depend on the number of inclusions and blemishes, their size and position, the colour of the inclusions, their nature - crystalline or cracks, whether or not they can be clearly seen by the naked eye and finally, if they affect the diamond's brilliance or durability.
Inclusions are formed naturally during the diamond's process of growth within the earth's interior, therefore Flawless and Internally Flawless diamonds are very rare and command a high price.
Diamonds graded as Included (I1, I2, I3) are sometimes referred to as P grade (P1, P2, P3) have inclusions and blemishes that are visible to the naked eye and the nature of the inclusions (fractures and cracks) can threaten the stone's durability making it more susceptible to chips, cracks and breaks. Slightly included diamonds (SI1, SI2) have noticeable inclusions that are easy or very easy to locate under 10x magnification.
All our diamonds are graded at least Very Slightly Included (VS1, VS2), meaning they only have minor inclusions that are not visible to the naked eye and can even be difficult to locate at 10x magnification. Rest assured that the presence of these very small inclusions does not impact on the brilliance or durability of the stone.
The cut of a diamond is the only one of the 4Cs that is influenced by hand. A well cut diamond can make light dance in breathtaking ways. A diamond's cut will influence its brilliance and lustre, it's fire, and it's scintillation (sparkle).
A diamond with a lower cut grade (good-poor), will tend to look darker and duller and may have a thick girdle meaning the diamond will look smaller than a well cut diamond of the same carat weight.
We love watching the light bounce off a beautiful diamond and only stock diamonds with cut grades of at least Very Good.
A diamond's weight is measured in 'carats'. Each carat is divided into 100 points and there are 5.00 carats to 1.00 gram.
When looking at a pair of earrings, the total carat weight is the weight of both diamonds combined.