DiamondView imaging of the 0.31 ct D-color type IIa modified round brilliant diamond shown in the figure above revealed an interesting fluorescence pattern. The image displayed blue fluorescence as well as a darker pattern in the shape of a cross. One of the pavilion main facets was longer than the other three, producing this distinct cross pattern when the diamond was viewed through the table. Depending on the specific angle of the pavilion main facets, such a distinct pattern might not be visible in the DiamondView.
Priyanka Kadam is a senior analytics technician at GIA in Mumbai. Shoko Odake is senior manager of identification at GIA in Tokyo.
DiamondView imaging of the 0.31 ct D-color type IIa modified round brilliant diamond shown in the figure above revealed an interesting fluorescence pattern. The image displayed blue fluorescence as well as a darker pattern in the shape of a cross. One of the pavilion main facets was longer than the other three, producing this distinct cross pattern when the diamond was viewed through the table. Depending on the specific angle of the pavilion main facets, such a distinct pattern might not be visible in the DiamondView.
Priyanka Kadam is a senior analytics technician at GIA in Mumbai. Shoko Odake is senior manager of identification at GIA in Tokyo.
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