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Diamond cut: from proportions to visual performance
Imagem · GIAGIA researchers review cut-quality assessment through light return, contrast and human perception. The article explores three-dimensional modelling and movement, explaining why proportions alone cannot describe every aspect of a diamond’s visual appeal.
What the report says
GIA discusses light return, contrast and appearance in motion, explaining why proportions alone cannot describe every aspect of cut quality. The research connects three-dimensional modelling with human perception.
JEWEL DAILY perspective
Our reading: combine parameter explanations with observation under comparable conditions. Let shoppers compare stones under the same lighting and viewing distance before changing the angle.
Online imagery is more informative when lighting, exposure and background remain consistent. The research should not be reduced to a new universal score, or used to imply that an existing grading system has ceased to apply.
