seems miraculous that the traditional 58 tiny facets
in a diamond, each precisely cut and sharply
defined, may be only two
millimetres in diameter. But without this precision,
a diamond wouldn’t be near as beautiful as it is.
Without a doubt, the allure of a particular diamond
depends more on cut than anything else.
The cut of a
diamond has three attributes: brightness (the total
light reflected from a diamond), fire (the
dispersion of light into the colors of the
spectrum), and scintillation (the light flashes – or
sparkle – when a diamond moves).
Ideal proportions, finish and symmetry of a cut are
the aim of the cutter, as well as the shape of the
stone. There is a difference though between cut and
shape. Shape means the outward look of the diamond
(such as round, radiant, oval and so on). Cut refers
to the reflective qualities of the diamond and may
very well be the most important of the 4C's.
Cut quality is divided as follows:
Ideal Cut; Premium Cut; Fine Cut; Good Cut; Fair
Cut; Poor Cut.
The Ideal, Premium, Fine and Good cut grades vary
respectively, from maximum brilliance, to reflecting
most of the light that enters the diamond. Diamond
proportions graded as Fair or Poor mean that the
diamond reflects only a fraction of the light that
The wrong proportions might cause the diamond to
lose its brilliance, scintillation, and fire, and
The finish of a diamond refers to the small details
affected by the cutter’s work, such as symmetry and
quality of facets: the crown, culet, table, girdle
- Crown: the upper part of the diamond which lies
above the girdle;
- Culet: the minute facet at the base of the
- Table: the large flat facet of the diamond;
- Girdle: the outer edge of a diamond where the
crown and pavilion meet;
- Pavilion: the lower part of the diamond which lies
below the girdle.