Versatile application: Suitable for aquariums, home plants, terrariums, and garden landscapes. Natural and decorative:Natural lava, these rocks add texture and visual interest to any environment. Thermal insulation and sound absorption: Porous and lightweight, they offer thermal insulation and sound absorption qualities. Fireproof and heatproof: Ideal for fire pits and grills, enhancing flame performance and spreading gas dispersion evenly. Reusable and long-lasting: With no decay or decomposition, these lava rocks are reusable and offer long-lasting decorative appeal.