"Burma produced at least 30 minerals in commercial amounts during 1987. The most important nonfuel minerals were barite, cement, copper, gem stones, gypsum, lead, silver, steel ingot, tin, tungsten, and zinc. Burma attained world-class production in two minerals. It was 6th in tungsten and 10th in tin output during 1987. Of the minerals, fuels were most important to the Burmese economy. In value, crude oil production was by far the most important mineral, followed by natural gas. An insignificant amount of poor-grade anthracite coal was mined...he mining sector employed 90,000 workers in 1987, which was 0.6% of the active labor force. Of these, 77,000 were employed by Government-owned mining companies. Mining accounted for 1.8% of the country?s net output of goods and services. Public investment in the mining sector totaled $34 million in FY 1986..."