A rock is a naturally occurring solid aggregate of one or more minerals. Rocks are geologically classified according to characteristics such as mineral and chemical composition, permeability, the texture of the constituent particles, and particle size. Aggregate is a broad category of coarse particulate material used in construction with predictable, uniform properties. Manufactured Aggregates are used as base material in landscapes, a stable foundation for roads and driveways, and drainage applications in leech fields and french drains.
