Polish refers to the degree of smoothness of each
facet of a diamond as measured by a gemologist. When a diamond is cut and polished, microscopic surface defects
may be created by the polishing wheel as it drags tiny dislodged crystals across the diamond's surface. Depending
on the severity, these defects may disrupt light patterns as the light rays enter and exit the diamond.
Each Lumera Diamond displays the polish grade as determined by the
GIA, using the following scale:
For diamonds with a polish grade of Excellent to Good, any polishing defects are not visible to the naked eye, and
should have no impact on the diamond's overall appearance.
For diamonds with
clarity grades of I1 or lower, even a polish grade of Fair is acceptable, since these diamonds already possess
inclusions that are visible to the naked eye, making any polish markings less relevant.
For diamonds less than .75 carats, any polish grade of Fair or better will not affect the appearance of the diamond
to an untrained observer.
Poor is the only polish grade that should be avoided regardless of the size or clarity of the diamond. For this reason,
Lumera does not carry diamonds with a polish grade of Poor.