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Thames & Kosmos Crystal Geode STEM Experiment Kit | Grow a Beautiful, Colorful Crystal Geode! | Explore Crystals, Rocks & Minerals| 3-Language Instruction Manual (English, French, Spanish)
Original price was: $99.99.$59.99Current price is: $59.99.
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Description
Grow a beautiful, colorful crystal geode — a hollow rock with crystals inside it — by first molding a plaster shell and then filling it with a crystal-forming solution. Learn about geological crystal formations.
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