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Recommended for ages 5 years to adult


What's a geode? It's a geological rock formation that contains a cavity lined with crystals. The most common "find" inside a geode is clear quartz crystals, but some have colored crystals—fluorite, calcite, amethyst or pyrite (fool's gold). There's no way to tell what's inside a geode until you break it apart—but that's the most exciting part!

For a fun and unique project for your budding geologist, try out our Break Your Own Geodes™ by GeoCentral®. Our unopened geodes ranges in size from 2 to 8 inches in diameter and are easy to break open and examine. Simply place an unopened geode in a bag or sock, give it a firm hit with a hammer (not included) and pull out your split geode. 80% of these large geodes have a hollow center filled with beautiful sparkling crystals, each one unique in its own way. Imagine treasures they will find and the abundance of possibilities the excitement of this fun activity could spark!

Our Geodes come in two amazing sizes! Please specify in the drop down box above your Geode size preference - Regular 2" or Massive 8".


  • Geodes are sold individually
  • Includes geological information and safety instructions
  • Adult supervision required
  • Geode contents are made by Mother Nature and will vary
  • Supports STEM learning
  • An ideal start to encourage scientific exploration and learning
  • Develops principles of geology, archeology, science, predicting skills and critical thinking skills
  • Requires hammer (not included)
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