The Gumeracha district was first worked for talc in 1900, but mining operations were small and intermittent until 1918 when it became a consistent producer. The curtailment of imports of Indian talc during the second World War materially further increased the output which has been sustained in post-war years. Mining is conducted by two companies - John Dunstan and Son (W.A) Ltd. and the Torrens Mining Co. Ltd - which sell chiefly to mineral milling firms in the Eastern States. The product finds a wide market for general industrial use, but is not suitable for special purposes such as high-grade cosmetics, because of the presence of albite feldspar in the original ore, which cannot be entirely eliminated by hand-picking mining methods as practised at present. Beneficiation will undoubtedly improve the product, but considerable experimental work is necessary before its advantages can be accurately assessed. This report covers the more essential features of the geology of the deposits and their likely reserves.