Diamond value is based on a combination of features, sometimes called value
factors. Diamond professionals use a special set of four value factors to
describe and classify diamonds (Colour, Clarity, Carat and Cut) 4C. Moreover,
the quality of cut grade and finished diamond, which is directly relates to its
value too. Because the width and depth of the diamond can have an effect on how
light travels within the diamond, and how it exits in the form of brilliance.
The well-cut diamond can make light perform in breathtaking ways, resulting in
a magnificent display of three important diamond attributes: brilliance, fire
In the diamond cut and polish rating, the rating of Finish (Polish and
Symmetry) is the important factor to the diamond value. To produce the superior
EXCELLENT rating of polish and symmetrical diamond, it has to consume the
enormous time and the money. Therefore, the general high valued diamond is
worth to investment, thus in high valued diamond, the rating of Finish often
has superior EXCELLENT.
Re-cutting or re-polishing a diamond to remove a blemish, often increases its
value. The impact of any weight loss is usually offset by the improved clarity.
However, it is much more difficult to calculate the excellent proportion cut
ratio of diamond without consideration of the weight of the diamond. Therefore,
diamond with 3 excellent (Cut Grade: Excellent; Polish: Excellent; Symmetry:
Excellent) is more rare than the one without 3 excellent. The more scare
something is, the more it’s worth.