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(140) results
Evaluates the usefulness of Raman spectroscopy in distinguishing the color varieties of nephrite based on the relative ratio of Mg to Fe concentration.
Demonstrates the importance of this method in identifying diamond treatments, based on the analysis of PL maps acquired from a brownish orange HPHT synthetic diamond.
Blue diffusion-treated sapphires are becoming more prevalent than ever before.
How variations in UV lamp output can affect observed fluorescence color and intensity.
Australia has been a prolific supplier of blue sapphire and has made enormous contributions to the global sapphire industry that still shape it today.
Results from GIA’s recent testing of a 5.19 ct CVD synthetic diamond, the largest it has examined to date.
Results from GIA’s recent testing of a 10.08 ct blue HPHT synthetic diamond, the largest HPHT synthetic recorded to date.
Several transparent, faceted, blue to blue-green copper-bearing tourmalines containing growth tubes and cracks surrounded by sleeves of pink color were examined for this report.
Examines Jaipur’s role as a colored stone cutting and jewelry manufacturing center, with profiles of 17 companies and their factory, trading, and retail operations.
Documents the retrieval and testing of P. maxima cultured pearls from a Lombok hatchery.
