Thames and Kosmos Glowing Crystal Geode J. K. Rowling Book Makes the perfect gift for

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Thames and Kosmos Glowing Crystal Geode J. K. Rowling Book Makes the perfect gift forCreate your own crystal geode a round rock containing a crystal filled cavity. First, cast a plaster geode shell in the mold and then fill it with a crystal growing alum salt solution. The crystal solution contains an ultraviolet luminous pigment that gets incorporated into the crystals as they form, resulting in a geode that glows in ultraviolet light. An ultraviolet flashlight with holder, as well as a display stand for the geode, are included.