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Lava sand is crushed scoria, a reddish brown to black volcanic slag. It has a texture full of holes. Lava sand is the most popular rock material. Considered by many to be an excellent source of energy for the soil. Lava sand makes soil nutrients more available to plant root. It provides aeration and porosity to the soil. It helps retain the right amount of moisture in the soil, is durable and resists degradation.
