Jul 05, 2020 Oman retains crown as worlds top gypsum exporter. For the third consecutive year, Oman maintained its dominant position as the worlds biggest exporter of gypsum shipping approximately 9.01 million tons of the commodity last year primarily to the ASEAN countries, Japan, India, Bangladesh, and South/East African countries. List of gypsum mines in the United States . Use the tools below to search for mines, quarries sites. You can combine all inputs, e.g. just searching by name, or by combining with other search parameters. All inputs are optional, use as many or as few as you wish.