What is Helium Polish and who benefits from it
What is new in the Helium Polish?
Versions history
Documentation for Helium Polish releases
Advantages for analyzing girdle asymmetry and removing girdle asymmetry
Scanning major and minor symmetry features
Measuring diameter of girdles with a conical shape, "CZ" sample
Photoreal image of Helium Polish 3D model
What is new in the Helium Polish reports?
Reports history

Customizing printing and viewing reports
Customizing export data
Customizing MS Word report templates
Customizing internal text report template
Helium Polish Illustrated reports (one page reports)
Reports for semipolished diamonds and arbitrary cuts
Recut reports
Helium Polish download

Helium Polish Highlights (PDF)
Helium Polish system manual (PDF)
Helium reports documentation (PDF)
Cut parameters
Creating and customizing pricelists (PDF)
DiBox 2.0
GemAdviser Free Version
Helium IG
Helium Polish
Helium Rough
Helium Tender
M-Box 2.0
M-Box 1.5
Oxygen DZ
Oxygen HIG
Oxygen Immersion
Oxygen Inclusion
Oxygen Microscope Server
Oxygen Viewer Free Version
Oxygen XRay Server
Pacor Client
Stereo Viewer Free Version

PACOR - Advanced Computer technologies for Processing of Rough diamonds
Laser Mapping of Concavities
Scanning major and minor symmetry features
Technology patent "A method and apparatus for locating inclusions in a diamond stone"
Immersion Glass
Helium help : Comprehensive list of report parameters
Pavilion depth

Applicable to any cuts

The definition has been updated. Follow the link for more details.

The pavilion depth is measured using main pavilion facets. It is measure for each main facet and then the average, minimum, maximum and deviation values are calculated. The software finds the lowest vertex of the whole model (it is one of the vertices of the culet or pavilion) and the highest vertex of each main facet.

Crown heights

Pavilion depth 1. If the main facet reaches the girdle in its highest vertex, the height between the found vertices is considered to be the height of the pavilion for the given main facet, as shown on the figure below.

Crown height 1

Pavilion depth 2. If the main facet does not meet the girdle, the corresponding vertex is substituted by the edge of the girdle measured at the azimuth of the highest vertex of the main facet, as shown on the figure below.

Crown height 2

If there are extra facets on the girdle, a virtual model without these facets is created and used for the measurement. To build the virtual model, the extra facets are removed and the neighboring facets are continued until they intersect.

Pavilion depth: ideal model

Comprehensive list of the Helium report parameters:

Measurements are used in different systems and tools:

DiamCalc Brilliant Cut Parameters