Feldspar

Feldspar is the primary fluxing agent in ceramic and glass manufacturing, lowering melting temperatures and improving the mechanical properties of tiles, sanitaryware, and flat glass. Classified under a single tariff line (2529100000), commercial grades are differentiated by potassium versus sodium content (K-feldspar vs. albite/oligoclase), which buyers specify based on firing temperature and end-product requirements. Turkey and Spain are the leading suppliers to the US, with Mexico, India, and Germany also among recorded sources. Turkey's dominance reflects its large, high-purity feldspar deposits that serve global ceramic industries.