The colour-grading system of The Cape Series assesses the colourlessness, or lack of colour within diamonds. The diamond colour-grading industry standard of Gemmological Institute of America (GIA) established a key chart starting from D to Z, whereby each level affects the value or price of a diamond. The charts grades the lack of colour, or degree of yellow hue/tint caused by levels of nitrogen present within the carbon crystal structure of a diamond. Graded for the degree of colourlessness and brilliancy exhibited by a diamond.
D – Exceptional White + – An Ultralight Beam of Pure Carbon– the diamond is a pure beam of crystal light that nature has created and man revealed. Light reflected and refracted within creates spectral proportions of a beautiful stone. This kind of beauty demands the highest price.
E – Exceptional White – The very difference is slight between D and E colour diamonds, however to the trained gemmologist’s eye it is possible to detect the difference. Light hitting the stone creates vibrant fire – refracted light causing an amazing burst of spectral colours.
F – Rare White + – Again the difference is slight between E and F colour diamond. Diamond is colourless, brilliant and of fine quality. Most reputable fine jewellers set F colour diamonds in their collection jewellery.
G – Rare White – In comparison to F colour diamond, G colour diamond exhibits a slight hint yellow – almost an idea of hue within the diamond, however it still exhibits very bright and brilliant stone.
H – White – The Average White – The diamond is an averagely colourless white. Set in jewellery the crown – the top half of the diamond has good lustre, exhibiting more white than yellow tint.
I – Slightly Tinted White – From here on in, this is when the diamond is has a tint of yellow detectable to the human eye.
J – Slightly Tinted White + – The yellow tint is a degree stronger sparkle of the diamond is – loosing its shine.
K – Tinted White – The diamond is noticeable yellow tint.
M to X- Light Yellow White – The yellow hue has hints of a light canary yellow – overtly visible to the human eye.
Diamond crystal forms within the earth’s surface over millennia and within the process of formation mineral crystals, gases, dust, cleavages and fractures occur internally and externally on the carbon crystal lattice. And after the diamond has been cut by a lapidarist and been through the mills – fractures, abrasion and other superficial damages may occur. The size and location of these inclusions and blemishes affect the clarity assessment of a diamond.
Internally Flawless – IF – Incredibly Freakingly Amazing– diamond is literally the purist specimen of crystal to be unearthed and it has been cut in such a way that man has created a mini masterpiece of a rock. Everyone knows a master pieces are rare and command a very high price.
Flawless – No overt visible inclusions. With a 10 – 20 times magnification loupe very small speck (s) of dust may be visible, however difficult to detect.
VVSI1- Very Very Slight Included One – A few small specks of gas bubbles or dust visible with a 10 times loupe. One might need to look with a 20 x magnification to see them properly. Diamond is bright and brilliant.
VVS2– Very Slight Included Two – Similar to VVS1, however gas bubbles and dusks pecks are fractionally bigger. Diamond is bright and lively.
SI1: Slightly Included One – Two or three minor inclusions – light coloured crystals, feathers, cleavages, fractures within the diamond located on the kite and star facets.
Si2–Slightly Included Two – Similar to the above, however inclusion are centrally located on the table facet.
Si3- Doesn’t officially exist – graded when a diamond is on the threshold between Si2 and PI1.
Some Gemmologist’s and diamond graders use it when they cannot decide whether a diamond is good enough to be Si2 or or tethering on P1.
Pi/Ii: Included 1- This is when significant dark inclusions or clouds are centrally situated on the table facet or kite facets which are overtly visible with a naked eye. No need for magnification.
P2 /I2: Included 2 – Dark inclusions, clouds, cleavages staring you in the face – significant surface reaching cleavages from the girdle, the edge of the stone. there is a fracture from the centre to the edge of the stone. Inclusions, and fractures beauty or durability is affected. These inclusion or fractures inhibit light moving around the diamond freely therefore affecting the lustre and brilliancy.
P3/I3: Included 3- Beauty and durability is of the diamond compromised. Large and significant dark inclusions centrally situated, possibly a white cloud covering the majority of the diamond thus affecting the reflection and light and lustre. or a large fracture across the diamond stemming from the one side of the girdle to the other.