The valuation of the quality is of very high importance. Here we observe the special features of the pearl’s surface, and the lustre.
The official grading system from French Polynesia is defined by four different qualities: A, B, C, and D. (A being the highest quality). A very special pearl can be listed as Top Gem. This grading system can easily be transferred to the other pearl types. It must be noted that other grading systems can be encountered.
Marc’Harit use the above mentioned grading system which ensures our delivery of a cohesive quality level.
Lustre is evaluated according to the reflection of light on the surface of the pearl; the brighter the reflection, the higher the lustre. Hence, a perfect lustre corresponds to a total reflection of the light, creating a mirror effect. The lustre is a direct indication of the quality of the pearl’s crystal layers of nacre. When a pearl has orient it has the highest quality of crystals. The light passes through all the layers and is reflected from the centre of the pearl. The pearl shines from the inside.
Special surface features are considered to be any flaws in the nacre such as pits, bumps, scratches, deposits, ridges and cracks. Whether a perfectly clean surface or a surface with small imperfections in terms of spots bumps or scratches the state of the surface can be evaluated by the naked eye. A high lustrous pearl with visible imperfections will be graded lower than a cleaner surface. The A and B grades where the surface is near to perfectly clean are rare and highly valued.