Popcorn
rock is a rock garden that grows! Popcorn rock is a natural occurring
mineral, found at limited outcrops in the Great Basin area of the western US. The geologic processes work to create the beautiful limestone formations. These formations attract visitors from around the
world to the thermal basins of Yellowstone National Park, and the underground rooms of Carlsbad Caverns. Simply put the rock in a clear glass bowl, add just enough vinegar to cover the rock completely, let the vinegar evaporate and watch the popcorn-like aragonite crystals grow. Complete instructions included.
