Applicable to any cuts
The crown height is measured using main crown facets. It is measured for each main facet and then the average, minimum, maximum and deviation values are calculated.
The software finds the highest vertex of the whole model (it is one of the vertices of the table) and the lowest vertex of each main facet.
Crown height 1. If the main facet reaches the girdle in its lowest vertex, the height between the found vertices is considered to be the height of the crown
for the given main facet, as shown on the figure below.
Crown height 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 lowest vertex of the main facet, as shown on the figure below.
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.
Comprehensive list of the Helium report parameters:
Measurements are used in different systems and tools: