Apart from oil and natural gas, the minerals sector included fertilizer production and production of construction materials, marble, and stone quarried from the Hajar Mountains. Copper and chromium have been found in Fujairah and Ra's al-Khaimah. In 2000, 60,000 tons of chromite ore were produced; 348,400 tons of ammonia (nitrogen content); and 243,400 tons of urea (nitrogen content). Lime, gypsum, hydraulic cement, and, presumably, common clays, diabase, gravel, limestone, sand, and shale were also produced.
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