Colour is a critical factor. Colourless diamonds are relatively rare and a truly colourless diamond will fetch a premium price.
Most diamonds have traces of yellow or brown due to the presence of nitrogen.
Diamonds are graded on a colour scale:
- D-F – Colourless
- G-J – Near colourless
- K-N – Slightly tinted
- O-Q – Tinted
- R-Z – Fancy colour (champagnes and cognacs)
Clarity refers to imperfections in a diamond, called inclusions. Inclusions are naturally occurring identifying characteristics and can look like tiny clouds, bubbles, feathers or black spots.
Inclusions block light and detract from a stone’s beauty. A diamond free of inclusions is very rare and therefore very valuable. The type and number of flaws in a diamond will determine the grade of clarity and the value.
- FLAWLESS (FL) No internal inclusions or surface blemishes visible under magnification.
- INTERNALLY FLAWLESS (IF) No interior imperfections but minor surface blemishes are visible under magnification.
- VVS1-VVS2 Very, very slight (or small) inclusions, that are difficult to detect under 10 power magnification.
- VVS1-VS2 Very slight (or small) inclusions, which are still difficult to see under 10 power magnification.
- SI1-SI2 Slight inclusions – minor imperfections visible under magnification, although not easily detectable to the untrained eye.
Carat is a gemologist’s standard that measures a diamond’s weight. One carat is divided into 100 “points”, so that a diamond of 50 points (pt) weighs 0.50ct. A carat weighs approximately one fifth of a gram, about the weight of a small paper clip.
Larger diamonds are found less frequently which in turn makes them more valuable, however carat weight alone does not determine value. Two diamonds of equal carat weight can differ greatly in price due to cut, colour and clarity. Size alone is meaningless.
The team at Ashley Douglas are able to answer all of your questions regarding the use of this material, prices and availability. Contact us today by phone, email or visit our workshop.