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Imitation Seed Pearl with Blue X-Ray Fluorescence

August 29, 2025

GIA Tests the World’s Second Largest Diamond

August 15, 2025

360-degree video of the Motswedi diamond.

The 3309 cm–1 Series in Sapphire and Ruby: A Focus on FTIR Peak Position Variation

June 5, 2025

Investigates the correlations between peak positions in the 3309 cm–1 series with trace element concentrations for ruby, metamorphic and basalt-related blue sapphire, and laboratory-grown sapphire.