When choosing diamonds, colour is a very important factor to consider. Rarity and purity are measured by a diamond’s lack of colour. Higher quality diamonds will have a pure, bright white appearance whereas those lower in quality will have noticeable colour, and to the untrained eye, this can be tricky to spot.
In the mid-1950s The Gemological Institute of America devised a colour grade scale between D - Z, to regulate and define the colour spectrum of diamonds. With D classed as completely colourless and Z being slightly yellow or brown in appearance. It is good to note that the colour of the diamond has a huge impact on its value.
However, this rule is not to be confused with coloured diamonds. Coloured diamonds are graded on a separate diamond colour scale and can even be more rare or valuable than the diamond.
To help you choose the diamond colour that is perfect for you, we have collated a few top tips
For multi-stone items of diamond jewellery such as diamond earrings, diamond eternity rings, Multi-stone pendants etc. we provide a Diamond Factory & EGL Jewellery Certificate of Authenticity which confirms the combined diamond carat weight and diamond quality for your peace of mind in the quality of your diamond jewellery purchase. As Multi-Stone Diamond jewellery has many diamonds, we offer a range of grading options like colour grades D-E, F-G, H-I. It is very difficult to source the specific grade diamond, when many diamonds need to match together exactly.
Fluorescence refers to a diamond's tendency to emit a soft colour glow when subjected to ultraviolet light (such as a "black light"). Roughly 30% of diamonds fluoresce to some degree.
A study performed in 1997 by the GIA found that the level of fluorescence has no widely perceptible effect on the colour appearance or transparency of diamonds when viewed table down (upside down). In the table up position, diamonds of Strong or Very Strong fluorescence appeared to have better colour than less fluorescent stones. The effect was most noticeable in the I-K colours.
The visible effects of faint to medium fluorescence are perceptible only to a gemmologist using a special UV light source.
Because the fluorescent glow is usually blue (which is the complementary colour to yellow) fluorescence can make diamonds of H-I colour appear up to one grade whiter. For this reason, H-I diamonds tend to sell at a slight premium when they possess Medium to Very Strong fluorescence. Overall, fluorescence should not be a major factor in the diamond purchase since its effects on appearance are negligible, if not slightly positive.
If you'd like to talk to an expert gemologist , or a member of our friendly Customer Care Team about choosing the perfect diamond colour for you, please get in touch on 0800 072 1170 0800 072 1170 or enter into a Live Chat as you prefer.