We currently take two different depth measurements on each gem.
This is measured from the top of the table to the bottom of the culet and is usually quite accurate. Illustration on what this measures is below.
Since we started doing this measurement more recently not all
gems will have their total depth. Some gems will only have the pavilion
depth so please pay close attention to the details of the gem you are
This is measured from the top of the girdle to bottom of the culet and does
not include the crown depth.
This measurement is difficult to do and so the measurement can differ
by .2-.3 mm from the true pavilion depth. We do our best and it
is usually quite close, but this measurement is somewhat imprecise.
A gemstone's crown height varies significantly depending on the cutting style (see images at left). Measuring from girdle to culet is typically one of the most important dimensions for determining whether a gem will fit in a particular setting.
There are some gems that have only the total depth and NOT the pavilion depth listed so please pay close attention to the details of the gem you are looking at.