1. The richest farmland was plowed and the richest mineral ore mined first. 2. -Executive Committee Member of the Goa Mineral Ore Exporters Association ( GMOEA ). 3. Pyrite is an insoluble crystalline structure that is abundant in coal-and mineral ores . 4. Mineral ores such as chromium, sulphur, and marble have been discovered in the district.5. Bauxite is a mineral ore used to produce alumina, a raw material of aluminum. 6. Biomining operations have enabled the solubilization of low-grade mineral ores . 7. In Zaire and Zambia, copper and cobalt are mixed in the form of mineral ore . 8. The region around Salem is rich in mineral ores . 9. The main objectives of the company was export of mineral ores and import of essential metals. 10. Tonnage can refer to the quantity of a mineral or the mineral ore extracted from a mine.
