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.
Learn about how crystals form and why the pigment glows under ultraviolet light.
Dimension:
Length: 22 cm. Width: 6 cm. Height: 28 cm. Weight: 2 kg.
