November 20, 2012

Rocks with Sparkle: How Do Geodes Form?

Kate Baggaley, Scienceline Commons

Geodes are irresistible. They fill display cases and museums everywhere. I’ve even got one on my desk at home: a smooth, brownish rock encasing milky lavender crystals. It’s hard to deny the allure of a rock that is rugged and weathered on the outside, yet so sparkly and colorful on the inside.

But where do geodes actually come from?

Read Full Article ››

TAGGED: Crystals, Geodes, Rocks