What's Inside a Geode

What's Inside a Geode


The geode is a fascinating stone that’s crystalline structure can take many forms. Most geodes contain clear quartz, but some have been known to foster amethyst! The best thing about geodes is that what’s inside is a surprise! Because of a geodes strong outer wall, it’s able to endure weathering, protecting its precious innards. The geode’s beautiful lining has made them a favorite stone among geologists and the public.

Geodes aren’t found alone, they are usually found in large numbers, and are formed in special environments. 

  • Volcanic geodes seem to be the most widely known, and they are created through volcanic activity. Air bubbles trapped inside lava flow help create cavities for these geodes to form! 
  • Sedimentary geodes are found in sedimentary rocks like limestones, dolomites, and shale. Inside of shells, tree roots and other organic materials, empty cavities within them can be filled with quartz, opal, agate, or other rock materials, and help create the inside of the geode. 

Here are some more facts about geodes!

  • Every geode is unique, like a fingerprint or a snowflake!
  • Geodes are often wet inside, so there may be water inside when you open it up!
  • The word “geode” comes from the Greek, meaning “earthlike.”
  • Geodes can be found in countries such as the US, Mexico, India, Brazil, Madagascar, and more!

These geode interiors are Amethyst, Stalactitic Silica, and Ethiopian Opal!