Pebbles are small roundish stones which could be either machined or natural. The sandstone pebbles are either roundish or squarish in shape.
Gravel and water filter pebble is composed of sub-angular, hard durable, and dense grains of predominately siliceous material. Extracted from a clean glacial deposit. Gravel and pebbles physical properties make it among the finest available in the world for water filtration applications. Our filter gravel is washed, clean dried, and screened to meet exacting specifications with strict adherence to quality control.