Professional fancy color diamond dealers rely on their visual perception above all else. Aside from substandard lighting conditions, they never doubt the accuracy of their loupe when evaluating a diamond’s color.
The Harald Schneider 10x loupe is available in two models: the L1 and the L2. When looking through the lens of an L2, a diamond exhibits a purple tint, which distorts the actual color of the stone. The perceptibility of purple depends on which side of the loupe is used to view the diamond, as one side of the lens displays a significantly stronger purple in the stone. The L1 does not show any purple reflection and presents ...