These illustrations show the four greater parts and the lesser parts that make up the facets of a round brilliant
Polished diamond has 4 great parts: the table, the crown, the girdle, and the pavilion.
A round brilliant diamond has between 57 and 58 facets (depending on whether the culet was polished into a facet or closed to a point):
- Table: 1 facet.
- For the crown: 8 bezels, 8 stars, and 16 upper girdle facets.
- For the pavilion: 8 pavilions and 16 lower girdle facets.
- Culet: 1 or 0 facet (if no culet facet). Also, in higher quality goods the girdle is frequently faceted, but these facets are not counted in the total.
Cut and Shape
Round BilliantThe Most Popular Cut
Round Brilliant Diamond
Emerald Cut Diamond
Pear Cut Diamond
Heart Shaped Diamond
- The tool used to measure the proportions of a diamond
- It is necessary to consider all the proportions and not only some of them. An angle of crown too large or too small is indicated in
- An open culet indicates a poor stone (except in the case of the old cuts).
melee, thick rondistsindicate not very interesting stones.
- Many professionals consider the cut the most important diamond characteristic because even if a diamond has perfect
colourand clarity, a diamond with a poor cut will have dulled brilliance.
- For those how
wishmore information regarding the proportions of the brilliant cut, they will know that in 1919, Marcel Tolkowsky published « Diamond Design » in which he describes his research on the proportions of the brilliant cut.
The Ideal Cut
It is a very vast subject, which divides the professionals still today. To obtain the maximum of brightness, fire, « life », a diamond must be cut according to certain dimensions and proportions. The diamond cutters must carefully consider the optical properties of each diamond to determine its optimal size.
The brilliance of a diamond is produced by the proportions of its cut.
Light is correctly reflected. Diamond has a beautiful brilliance and fire.
Light is lost out the sides causing the diamond to lose brilliance
Light escapes out the bottom causing the diamond to appear dark and dull
To obtain an ideal cut, the 3 principal elements, are total depth, table size, and girdle thickness
Total Depth Percentage (%)
To obtain an ideal cut, the 3 principal elements, are total depth, table size, and girdle thickness. Other factors must also be considered, as well.
Table Percentage (%)
TableOnly round diamonds have a standard for table size. In round diamonds for a diamond to be recognized as an ideal
The best girdle range for a diamond to fit in the ideal cut category for rounds is anywhere between « Thin » and « Slightly Thick ». The girdle could be Thin, Medium, Slightly thick or any combination of the three, such as « medium to slightly thick ». The various graduations thickness of the
Other elements are important, such as the culet size. The culet size is listed on a certificate and your diamond’s culet should be pointed (no culet), very small, small or medium because these are not visible to the naked eye. The graduations of the culet size
The girdle of diamond can be faceted, polished or rough. Diamonds which has a very beautiful cut have often the faceted girdle. A diamond cutter must work from additional time to