These parameters are applicable only to Round brilliant cut.
Main Crown Facets Azimuth Symm
Main Crown Facets Azimuth (symmetry) is the deviation of azimuths of the normals to the main crown facets from the ideal values. As all symmetry parameters, it is an estimate of a deviation from perfect symmetry, and should be zero for an ideal stone.
Normal vectors to the main crown facets (bezel facets) are constructed, and their azimuth calculated. Then all pairwise differences of these azimuth are found, and their deviations from the ideal values are considered. The deviations for the adjacent and opposite facets are put in the Array A, the rest in the Array B. The final value is calculated as
Main Crown Facets Azimuth = max(max(Ai), 1/2 max(Bi))
Reporting
The maximum values of arrays A and B are reported separately.
| Reported in | Section | Values | Units | Bookmarks |
|---|---|---|---|---|
Full Report for Brilliant | Main Parameters | Overall value | ° |
|
| Max(Array A) | ° | MAIN_CRN_FACET_AZIMUTH_SYM_DEG1 | ||
| Max(Array B) | ° | MAIN_CRN_FACET_AZIMUTH_SYM_DEG2 |
Individual values of azimuth differences between particular facets are not reported.
Main Pavilion Facets Azimuth Symm
Main Pavilion Facets Azimuth (symmetry) is the deviation of azimuths of the normals to the pavilion facets from the ideal values. As all symmetry parameters, it is an estimate of a deviation from perfect symmetry, and should be zero for an ideal stone.
Normal vectors to the pavilion facets are constructed, and their azimuth calculated. Then all pairwise differences of these azimuth are found, and their deviations from the ideal values are considered. The deviations for the adjacent and opposite facets are put in the Array A, the rest in the Array B. The final value is calculated as
Main Crown Facets Azimuth = max(max(Ai), 1/2 max(Bi))
Reporting
The maximum values of arrays A and B are reported separately.
| Reported in | Section | Values | Units | Bookmarks |
|---|---|---|---|---|
Full Report for Brilliant | Main Parameters | Overall value | ° |
|
| Max(Array A) | ° | MAIN_PAV_FACET_AZIMUTH_SYM_DEG1 | ||
| Max(Array A) | ° | MAIN_PAV_FACET_AZIMUTH_SYM_DEG2 |
Individual values of azimuth differences between particular facets are not reported.
Star Facets Azimuth Symm
Star Facets Azimuth (symmetry) is the deviation of azimuths of the normals to the star facets from the ideal values. As all symmetry parameters, it is an estimate of a deviation from perfect symmetry, and should be zero for an ideal stone.
Normal vectors to the star facets are constructed, and their azimuth calculated. Then all pairwise differences of these azimuth are found, and their deviations from the ideal values are considered. The deviations for the adjacent and opposite facets are put in the Array A, the rest in the Array B. The final value is calculated as
Main Crown Facets Azimuth = max(max(Ai), 1/2 max(Bi))
Reporting
The maximum values of arrays A and B are reported separately.
| Reported in | Section | Values | Units | Bookmarks |
|---|---|---|---|---|
Full Report for Brilliant | Main Parameters | Overall value | ° |
|
| Max(Array A) | ° | | ||
| Max(Array B) | ° | |
Individual values of azimuth differences between particular facets are not reported.
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