3pc Popcorn Rocks ~ Gift Shop Crystals ~ DIY Kits Minerals

This listing is for 3 pieces of Popcorn Rocks. This kit is great for chemistry, geology, or just having fun! Submerge the limestone rock provided in white distilled vinegar. As the vinegar evaporates, popcorn-like aragonite crystals will form. Growing time is one to three weeks, but the crystals will last for years to come after the rock dries.