These parameters are applicable only to Round brilliant cut.

2R roundness

2*radius roundness_<angle> is the doubled maximum difference of girdle radius values within the sector of  <angle> degrees.

The maximum absolute difference of radius measurements within the sector of  <angle> degrees is considered. The maximum of this value over all directions, multiplied by 2, is the 2*radius roundness (<angle>).

Reporting

Reported inSectionValuesUnitsBookmarks

 

 

 

Full Report for Brilliant

 

 

 

Detailed Parameters

Measured at 15°

 



Both %(diameter) and grades (EX, VG, etc.)

RADIUS_ROUNDNESS_PC_1, RADIUS_ROUNDNESS_SYM_1

Measured at 22.5°RADIUS_ROUNDNESS_PC_2, RADIUS_ROUNDNESS_SYM_2
Measured at 30°RADIUS_ROUNDNESS_PC_3, RADIUS_ROUNDNESS_SYM_3
Measured at 45°RADIUS_ROUNDNESS_PC_4, RADIUS_ROUNDNESS_SYM_4
Measured at 90°RADIUS_ROUNDNESS_PC_5, RADIUS_ROUNDNESS_SYM_5
OverallGradeRADIUS_ROUNDNESS_SYM

The MyAppraiser panel contains just the values measured at 22.5°, 45°, and 90°, denoted 2RRoundness_<angle>.

Diameter roundness

Diameter roundness at  <angle> is the difference of girdle diameters between the directions at an angle of  <angle> degrees.

Diameter is measured in two directions at an angle of  <angle> degrees and the absolute difference of these measurements is considered. The maximum of this value over all directions is the Diameter Roundness (<angle>).

Reporting

Reported inSectionValuesUnitsBookmarks

 

 

 

Full Report for Brilliant

 

 

 

Detailed Parameters

Measured at 15°

 



Both %(diameter) and grades (EX, VG, etc.)

DIAMETER_ROUNDNESS_PC_1, DIAMETER_ROUNDNESS_SYM_1

Measured at 22.5°DIAMETER_ROUNDNESS_PC_2, DIAMETER_ROUNDNESS_SYM_2
Measured at 30°DIAMETER_ROUNDNESS_PC_3, DIAMETER_ROUNDNESS_SYM_3
Measured at 45°DIAMETER_ROUNDNESS_PC_4, DIAMETER_ROUNDNESS_SYM_4
Measured at 90°DIAMETER_ROUNDNESS_PC_5, DIAMETER_ROUNDNESS_SYM_5
OverallGradeDIAMETER_ROUNDNESS_SYM

This parameter is not featured on the MyAppraiser panel.