Geodes form in gas bubbles inside fresh lava, or in rounded cavities in sedimentary formations. After rock around the cavity hardens, dissolved silicates and/or carbonates are deposited on the inside surface allowing crystals like Amethyst to form inside the hollow chamber. Safe & non-toxic.Â
Weight: .67 lbs
Dimensions: 4.75 x 3Â x 3.75 in
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