Interference Colors in Anisotropic Minerals
When the "ordinary" and "extraordinary" rays emerge from a birefringent crystal (above, left), they are still vibrating at right angles with respect to one another.
Interference Colors
Colors revealed by a polarisope as polarized light pass through a gemstone. Used to detect the presence of double refractivity in a gemstone.
Randomly oriented hematite platelets exhibit interference colors under oblique illumination. The host is a very unusual sunstone from Tanzania. (Photos: Wimon Manorotkul) ...
 See also: Color, Cleavage, Crystal, Crystals, Quartz
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