A Diamond’s Table Size
The table of the diamond is the largest facet of the diamond; the flat top surface of the diamond.
The Table % of the diamond is calculated by dividing the width of the table by the diameter of the diamond (taken from each end of the girdle) multiply by 100.
Example: 3.5mm table / 6mm width table x 100 = 58%
The size of the table may affect a diamond's beauty in different aspects:
Diamonds with a larger table will appear bigger than diamonds with a smaller table, hence having a larger spread.
A diamond with a smaller table has more fire as there is a larger surface area of the crown facet area, where more light enters and exists at a critical angle, causing more dispersion of light.
Diamonds with a larger table appear brighter. This is due to the contrast differences in the diamond. A smaller table appears to have thicker arrows of contrast, leaving the diamond to be less bright. A diamond with a larger table has smaller sized arrows of contrast, leaving more space of brighter areas (more light return), resulting in a brighter diamond.
Diamonds with a smaller table produces a higher amount of scintillation. Since there is more interplay between the crown and the pavillion facets, we will see more patterned scintillation and sparkle scintillation.
+ sparkle scintillation
+ patterned scintillation
- sparkle scintillation
- patterned scintillation
*danger of fish eye effect
With all this in mind, what kind of table diameter should I go for?
The ideal range would be 53-58%.
Diamonds are all about finding the perfect balance of brightness, contrast, fire, scintillation and spread. However, a diamond with a larger table appears to have more CON's than PRO's. When the table reaches too high a level, light leakage is apparent under the table. When a ring is worn, dust and dirt may be seen right through the table, leaving the diamond appearing even less bright than it should.
When picking a diamond in the ideal range of 53-58, look to the other angles and minor facets such as the stars and lower halves, these would start to have a higher impact of how a diamond is performing.