Cross in Natural Diamond
A cross pattern observed in this DiamondView image of a 0.31 ct D-color type IIa diamond. Image by Priyanka Kadam.
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.
