Moonstones and rainbows, dark blue, turquoise, yellow and white!  Feldspars are among the most common minerals on Earth - and yet exhibit fascinating textures and colors.  

One simple, chemical diagram explains the three chemical end-members - and all our feldspars can be mapped onto that diagram.  Add some Iron (Fe), Copper (CU) or cool the feldspars slowly in a deep magma chamber, and we get all sorts of wonderful results.  

 

Tertiary Diagrams.jpg

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