- Deviation from circular shape
- Tilted table / Eccentric table
- Eccentric culet
- Symmetry of table and table edges
- Size of the facets
- Regularity of the facets
- Edge displacement of crown and pavilion facets
- Size of the culet
- Symmetry of the girdle
- Table of Symmetry Features
Symmetry faults are irregularities in the cut caused during cutting.
Determination of proportions includes the following measurable symmetry features:
- deviation from circular shape
- tilted table
- eccentric table
- eccentric culet.
Symmetry features are examined visually under 10 x magnification and judged according to degree of discernibility. Thus:
| Crown | Deviation from circular shape Tilted table Eccentric table Wavy table edges Truncated main facets Main- facets too short Transposed facet edges Facets of unequal size |
| Girdle | Girdle with unequal thicknesses Wavy girdle Edge displacement at girdle |
| Pavilion | Truncated main facets Main facets too short Girdle facets of unequal lengths Facets of unequal size Appearance of the culets |
Table of Symmetry Features
| Crown | Girdle | ||
 |
Deviation from circular shape |
 |
Knife-edged |
 |
Tilted table |
 |
Thin |
 |
Eccentric table |
 |
Medium |
 |
Wavy table edges |
 |
Thick |
 |
Truncated main facet at girdle |
 |
Wavy |
 |
Truncated main facet at table |
 |
Unequal widths |
 |
Main facets too short |
 |
Edge displacement: crown and pavilion |
 |
Transposed facet edges | Pavilion | |
 |
Facets of unequal size |
 |
Eccentric culet |
 |
Truncated main facet | ||
 |
Main facet too short | ||
 |
Girdle facets of unequal lengths | ||
|
|
Facets of unequal size |
| Table reflection to estimate pavilion depth | Deviation from circular shape |