Prepared by the Imperial Cushions editorial team. Laboratory terminology is retained where a report is cited; historical context and dealer judgment are identified as interpretation.
Matching antique diamonds is a specialist exercise because no two hand-cut stones are identical. The aim is visual harmony, not mechanical duplication.
Face-up scale first
Carat weights can differ while dimensions appear balanced. Compare length, width, outline and apparent spread before focusing on weight alone.
Match the light behaviour
Facet rhythm, culet position, brightness and contrast should feel related when the stones move together. Slight differences can be charming, but one stone should not dominate the other.
Colour and fluorescence
Laboratory grades are important, yet earrings are seen face-up and in changing light. Fluorescence should be evaluated together, especially when the stones will sit close to the face.