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January-February 2016

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Word to the Wise: Blue Lava

Most readers are familiar with the many blue minerals highlighted in this issue of Rocks & Minerals. Some rocks are also blue, due to an abundance of blue minerals. But blue lava—is that possible? A very unusual phenomenon is currently in play on Indonesia's Kawah Ijen volcano: the eruption of blue lava (see figure; by the way, there has been no digital enhancement or change in the image colors).

Dr. John Rakovan, an executive editor of Rocks & Minerals, is a professor of mineralogy and geochemistry at Miami University in Oxford, Ohio.       

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