Tune in to the phenomenon of ulexite. Plop this rock on any surface and it demonstrates a cool fiber-optic effect. The mineral ulexite projects images to its surface, that's how it got the nickname "TV ROCK". It's a super fun addition to any rock collection. Made in the USA 6x1x3.5" peggable card with information. Part of Copernicus Toys Compact Curiosities line -- small packages full of big wonders. Great little collectible science toys and STEM demonstration items. Perfect for birthday gift bags, stocking stuffers, and Easter baskets--or any time you need a little science. Spark curiosity for collectors of science and nature We recommend Compact Curiosities for a wide range of retail settings including toy stores, gift stores, children's museums, science museums