Traditionally, lithium carbonate has been the form in which lithia is added to the glass batch. Its high cost, fineness, and the fact that it emits carbon dioxide on fusion has limited its use to the specialty glass sector, where its presence is dictated by the required properties of the product. However, the recent availability of low cost lithium minerals has enabled the container glass and flat glass industries to look at these materials as melting aids. One such material is glass grade spodumene, which contains 5 percent Li//2O. The article describes production of spodumene and the results of plant trials using the mineral.