When you hold a piece of lava rock in your hand, you are holding a piece of ancient history. Primordial volcanoes formed these gems centuries ago, making them revered healing crystals believed to possess ancient wisdoms that have been lost to mankind. Lava rock, or basalt as it is sometimes called, is often used during work on the chakras to ground the root chakra and during reiki therapy to ground the body and help to calm intense emotions. For magical practices and rituals, lava rock is especially powerful because it is linked to all of the elements. Our Lava Stone Tumbled Gemstones are sold by weight. The gems in your assortment will vary in size. 1/4 lb. package.