ROCK WITH A CRYSTAL INSIDE Crossword Clue

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Crossword Puzzle Infos
A geode is a type of rock that contains a crystal inside. It is formed when gas bubbles in molten rock become filled with mineral-rich water, which then cools and hardens. The outer layer of the geode is usually made up of chalcedony, while the inner layer is composed of quartz crystals. Geodes can be found in many places around the world, including deserts, riverbeds, and volcanic regions.
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