The Quality and Value of a Diamond is determined by the 4 C's.
Diamonds with the highest 4C ratios are the rarest and therefore the most valuable.
The Four C's of Diamonds are:
The Cut Grade measures how the individual proportions combine to effect the beauty of a diamond.
Diamonds with a high cut grade will have a high degree of brightness, fire / rainbow colours,) and scintillation (sparkle).
- High cut grades include "Excellent and 'Very Good"
- Midrange includes "Good"
- Low end includes "Fair" and "Poor"
Excellent + / Very Good
These diamonds will have a high degree of brilliance, fire and scintillation.
This grade will generally be a bit darker or lacking scintillation.
Diamonds in this category lack brightness, fire and scintillation.
Diamonds in this category show very little brightness, fire and scintillation.
All diamonds contain imperfections. The very best, and rarest, clarity is Internally Flawless (IF).
Because many inclusions are not visible to the naked eye, diamonds are graded under lOx magnification.
Diamond Carat Weight
Diamond weight is measured in carats and points. There are 100 points in a carat.
One carat = 0.2grams and one point = 2 milligrams.