Steven Dutch, Natural and Applied Sciences, University of Wisconsin - Green Bay

Plane-Polarized Light

Crossed Polarizers

Quartz, the feldspars, cordierite and nepheline all have low relief and gray to white interference colors. Beginners find them hard to tell apart. View Quartz and its Look-Alikes.

The photo below shows tartan twinning clearly.

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Created 22 Sept 1997, Last Update 14 Dec 2009

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