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  1. Geode - Wikipedia

    Geode Quartz -filled geode, shown from inside (top) and outside (bottom) A geode (/ ˈdʒiː.oʊd /; from Ancient Greek γεώδης (geṓdēs) 'earthlike') is a geological secondary formation within sedimentary …

  2. What Are Geodes and Where Can You Find Them? - HowStuffWorks

    May 2, 2024 · What Is a Geode? Geodes are geological formations characterized by their spherical shapes and hollow interiors, often lined with colorful crystals. Derived from the Greek word geoides, …

  3. What Is a Geode? How to Find and Open Geodes

    Apr 27, 2021 · A geode is a hollow rock containing minerals or crystals deposited by mineral-rich water. The word “geode” comes from the Greek word for “Earth-like.” Geodes are popular with collectors …

  4. Geodes: The rocks with a crystal surprise inside! - Geology.com

    Geodes are spherical to subspherical rock structures with an internal cavity lined with mineral materials. They have a durable outer wall that is more resistant to weathering than the surrounding bedrock. …

  5. Geode | Crystals, Formation & Structure | Britannica

    Geode, hollow mineral body found in limestones and some shales. The common form is a slightly flattened globe ranging in diameter from 2.5 to more than 30 cm (1 to 12 inches) and containing a …

  6. What Is a Geode and How Do They Form - astrowest.com

    Curious about what is a geode? This guide explains how these crystal-filled rocks form, showcases stunning types like amethyst, and teaches you how to open one.

  7. What is a Geode, Types of Geodes - Geology In

    A geode is a geological formation characterized by a hollow interior lined with mineral crystals. These formations typically exhibit a spherical or subspherical shape, although some can be oblong, and …

  8. Geodes: Nature’s Hidden Treasure Chests – How They Form

    Apr 23, 2025 · What Is a Geode? A geode is a spherical or oblong rock with a hollow interior lined with crystals or mineral deposits. The outer shell is typically composed of chalcedony or dense volcanic …

  9. Geode – What are geodes and where to find them? - DesertUSA

    What is a Geode? A geode is a spherical or round rock characterized by its unique hollow cavity, intricately lined with an array of sparkling crystals. Unlike solid rocks known as nodules, geodes …

  10. GEODE Definition & Meaning - Merriam-Webster

    The meaning of GEODE is a nodule of stone having a cavity lined with crystals or mineral matter.