Lava Stone Keychain with Blue Agate for Important Decisions Lava stone is excellent for calming emotions thanks to its grounding qualities. Formed from cooling magma, lava is thought to symbolize rebirth, and aid in releasing emotional baggage. Great accessory for Aroma Therapy. Holds essential oils for 8 hours. Diffuse your favorite essential oil onto one of the Lava Stones as Lava stones are porous - allowing you to add a drop or two of your favorite Essential Oil. The oils only stay for about 8-10 hours, so you can change easily the next day to a new one. Agate is THE stone everyone should have for protection. It attracts strength, protects from bad dreams, stress and energy drains.