Growing pearls with excellent lustre requires the right environmental conditions and good timing. Poor – Reflections are dim and diffused.Fair – Reflections are weak and blurred.Good – Reflections are bright but not sharp, and slightly hazy around the edges.Very Good – Reflections appear bright and near sharp.Excellent – Reflections appear bright and sharp.When grading pearls, the predominant system used by the industry was created by the Gemological Institute of America, you can read more here, and here’s a helpful summary of how the GIA grades lustre. Pearls with exceptional lustre also display orient – an iridescent shimmer just below the surface. We believe that lustre is crucial to the enjoyment of a pearl. When pearl grading, ‘Excellent Lustre’ means that reflections are sharp and bright, while poor lustre means reflections are diffused and dim. ![]() The better the lustre, the shinier the pearl and the more they appear to light up when they are worn. Lustre is the term used to describe the unique, iridescent shininess of a pearl.
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