Sunstones are copperbearing gemstones that come from small areas of Oregon's Columbia River Flood Basalts. But little is known about how Oregon’s official state gemstones are formed.

Geologist Emily Cahoon sets out to uncover the many mysteries of these enigmatic yellow, red, and even bluegreen gemstones.

Join “Oregon Field Guide” as we set out to uncover the many mysteries of the official state gemstone.

Learn more: https://www.opb.org/article/2022/02/2...

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