Millions of Names

The field of igneous petrology – the study of the chemistry and origins of the many igneous rocks around the world – is infamous for the number of names. It is off-putting for students and, frankly, I don’t know of anyone who has an interest in...

Those Fabulous Feldspars

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...

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