The glass industry produces metal-bearing waste through polishing, coating, and coloring processes. Waste such as polishing sludges, used filters, and metal-coated glass can contain silver, tin, lead, or rare earth elements. Although the bulk of glass is inert, these additives require separation and recovery. Processing involves mechanical separation followed by chemical extraction of metals. Recovered metals can be reused, while proper treatment of glass waste reduces landfill use and environmental impact.