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Thames & Kosmos Glowing Crystal Geode - image 1 of 4
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About this item


  • Grow a big, beautiful crystal geode that glows in UV light
  • Explore the science of how crystals grow and why substances glow
  • Includes a special UV flashlight and display stand
  • 16-page full-color manual


Suggested Age: 8 Years and Up

Material: Plastic, Wood

Includes: UV lamp, dye, measuring cup, model base, instruction guide

Number of Players: 1 Player

Educational Focus: Science

Battery: 1 AAA Alkaline, Required, not included

TCIN: 51460543
UPC: 814743011892
Item Number (DPCI): 086-00-1114


Create 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. Display your beautiful specimen day and night! Learn about how crystals form and why the pigment glows under ultraviolet light.
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