Shell grit - WikipediaShell grit is coarsely ground or broken seashells. It is used, among other things, by birds as a . Publishing. Jump up ^ Snails, Shell grit & Liliums - Gardening in Oz Forum - GardenWeb Archived February 5, 2012, at the Wayback Machine.shell grit machine details,Development of an abrasive material using periwinkle shells .Periwinkle shells were processed into FEPA grit standards by ball milling and then sieved . The equipment used during the course of this work were: ball milling.
shell grit machine details