These parameters are applicable only to Round brilliant cut.
Junction Bezel Twist
Junction Bezel Twist (symmetry) is the signed difference of azimuth between the points on the girdle that correspond to the bezel facets and pavilion facets. As all symmetry parameters, it is an estimate of a deviation from perfect symmetry, and should be zero for an ideal stone.
The bottommost point of a bezel facet and the topmost point of the corresponding pavilion facet are considered, and the signed differences of their azimuths is calculated. Besides, the distance between the projection of the said points to table plane is also calculated.
Reporting
The reported values of Junction Bezel Twist include: 8 independent measurements for individual facets, summary parameters (Avg, Min, Max, Dev), and the overall absolute maximum, referred to in the reports as Junction Bezel Twist Max.
Reported in | Section | Values | Units | Bookmarks |
---|---|---|---|---|
Full Report for Brilliant |
Main Parameters | Avg, Min, Max, Dev | ° and mm |
|
Absolute maximum | ° | JUNCTION_BEZEL_TWIST_ABS_MAX_DEG | ||
Detailed Parameters | All 8 values | ° and mm |
|
Junction Bone Twist
Junction Bone Twist (symmetry) is the signed difference of azimuth between the points on the girdle that correspond to the upper girdle facets and lower girdle facets. As all symmetry parameters, it is an estimate of a deviation from perfect symmetry, and should be zero for an ideal stone.
The point on the junction of the girdle and two upper girdle facets is considered. Its azimuth is compared to that of the corresponding point on the junction of the girdle and two lower girdle facets, and the signed difference is taken.
Reporting
The reported values of Junction Bone Twist include: 8 independent measurements for individual facets, summary parameters (Avg, Min, Max, Dev), and the overall absolute maximum, referred to in the reports as Junction Bone Twist Max.
Reported in | Section | Values | Units | Bookmarks |
---|---|---|---|---|
Full Report for Brilliant |
Main Parameters | Avg, Min, Max, Dev | ° and mm |
|
Absolute maximum | ° | JUNCTION_BONE_TWIST_ABS_MAX_DEG | ||
Detailed Parameters | All 8 values | ° and mm |
|
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