Materials › 4" – 6" Erosion Stone Image 1 of 1 4" – 6" Erosion Stone from $15.50 A large, heavy stone designed to prevent erosion and stabilize slopes, shorelines, culverts, and drainage channels. Rate: Select Rate Retail Contractor Call for a Quote Added! A large, heavy stone designed to prevent erosion and stabilize slopes, shorelines, culverts, and drainage channels.