Rain Forest 27.50 cu. ft. 3/16 in. 2200 lbs. Black Washed GravelMargo Garden Products Gravel collection selects only high quality all natural stone from regions surrounding the Southwest Pacific. Use landscape rock and gravel to control for water erosion, decoration around trees and flower beds, topcoat material for a ballast roof system and or reduce water usage with a dry scape lawn and garden. Margo's rock and gravel helps stimulate a healthy natural environment for fish in aquariums, ponds and reduces the