"Grow amazing crystals at home with the National Geographic Purple Crystal Lab Kit The crystal grows in as little as 3 days Inside is a real chevron amethyst to compare to the home-grown crystal National Geographic’s premium learning guide teaches the fascinating science behind this experiment Includes 1 crystal-growing powder packet (95 g), 1 glow-in-the-dark seed rock, 1 magnifying glass, 1 wooden spoon, 1 display stand, 1 chevron amethyst specimen and 1 learning guide with instructions"