FeatherRock 8"-12" Fire Gray Lava Rock Boulders are an exceptional choice for enhancing your outdoor landscape with their unique lightweight design and captivating colors. These boulders, featuring colors of charcoal and silver gray, are formed from a rare volcanic occurrence, resulting in irregular shapes that add character to any setting. Their porous nature not only provides visual interest but also makes them easy to carve and shape for various applications. Whether you're creating a stunning rock garden, building serene water features, designing functional retaining walls, or surrounding a fire pit, these lava rock boulders offer the perfect combination of beauty and practicality.