The two to four inch large gray lava stones are produced when volcanic lava reacts with cool ocean water and hardens to form a temperature resistant rock. The Lava goes through a manufacturing process which removes any sharp edges and gives them their uniform shape.
American Fire Glass large two to four inch lava stones are extremely durable and have been fire and freeze tested. Lava stone do not emit smoke or any toxic chemicals. You and your guests will love warming themselves around your fireplace or fire pit when you choose American Fire Glass large lava stone.The American Fire Glass Large Gray Lava Stone (2" - 4") inches large lava stones are close to indestructible and should last a lifetime. The America Fire Glass large lava rock are available in 10 or 20 lb. bags along with many other American Fire Glass products at backyard-flame.com.