Nepheline is mined from syenite bodies and processed to feed glass and ceramics, where it replaces feldspar due to favorable fluxing and alumina contributions. Major industrial operations use open-pit mining with primary/secondary crushing, grinding, magnetic separation to reduce iron, and classification to achieve particle-size targets for float glass, container glass, sanitaryware, and tiles. Because these industries prize chemical consistency and low Fe/Ti impurities, deposits with uniform chemistry enjoy long mine lives under multi-year supply contracts. Power, wear parts, and reagent costs drive processing economics; winterization and logistics (rail to glass hubs, bulk shipping) shape delivered costs in northern latitudes.