Lustre

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Lustre is how well the light reflects from the pearl back to the eye. When looking at a cultured pearl, a window/box reflection is noticed. The sharper and more intense this reflection is, the higher the lustre.

Akoya Lustre

  • Very high lustre: The reflection is so brilliant the box appears to be like a mirror. This level is very rare and hard to obtain
  • High lustre: The reflection is very strong, the appearance is like a ball bearing, the box reflection is still sharp and clear
  • Medium lustre: The reflection is slightly fuzzy, the pearl still appears to be solid
  • Low lustre: The reflection is fuzzy, the pearl appears to be flat and possibly chalky in appearance
  • Very low lustre: The reflection is almost non-existent, very fuzzy, difficult to discern the box. Appearance very flat and very dull
Lustre Grade
Very high 10
High 8-9
Medium 5-7
Low 3-4
Very low 1-2

Evaluating Factors

Overtone Color
Body Color
Shape
Size
Lustre
Nacre Thickness
Blemishes
Matching
Final Grade
Worksheet
Pricing
Pile of Pearls

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