US mine production of bauxite in 1993 was estimated to have increased over 1992. However, imports continued to dominate the US market. Domestic bauxite mine amounted to less than 1 % of total world production. It was used for nonmetallurgical purposes, such as abrasives, chemicals, proppants and refractories. Metallurgical grade bauxite amounting to 11.4 Mt (12.5 million st) was imported from 12 countries. Principal suppliers were Jamaica, 34%; Guinea, 33%; Brazil, 16% and Guyana, 11%. The average value, c.i.f. US ports, was $37/t ($33/st), according to the US Customs Service. Calcined refractory grade bauxite imports amounted to 15 kt (16,500 st) with an average value of $114/t ($103/st) c.i.f. US ports. China supplied 49%, followed by Guyana, 19% and Brazil, 12%. Imports of other grades of calcined bauxite, primarily for the abrasives market, totalled 103 kt (113,000 st). They came from China, 84% and Australia, 11 %, and had an average value of $77/t ($70/st) c.i.f. US ports. Annual alumina production in 1993 from the five Bayerprocess plants in the United States was estimated at 5.3 Mt (5.8 million st), about the same as in 1992. Yearend alumina production capacity was about 5.7 Mt(6.3 million st). Alumina imports in 1993, including 63 kt(69,000 st) of aluminum trihydrate, totalled 3.9 Mt (4.3 million st). They had a value of $204/t ($185/st) c.i.f. US ports. Total imports were 16% below 1992 figures. Australia supplied 69%, followed by Jamaica with 10% and Suriname, 8%. Alumina exports during 1993, including 34 kt (37 million st) of aluminum trihydrate, amounted to 1.2 Mt (1.3 million st). Canada received about 66% of these exports.