The scale of China's stone deposits is mainly large and medium-sized, with large mines accounting for 47%, medium mines accounting for 20% and small mines accounting for 33%. More than 98% of the total retained reserves are distributed in large mines, while the reserves of medium and small mines only account for nearly 2%. Among the large mines, there are 26 very large scale (reserves greater than 200 million t), of which the largest is the Dawenkou Basin in Shandong Province, with nearly 30 billion t of anhydrite ore reserves associated with salt mines. Among the mineral areas that have been used and can be used in the near future, large mines account for 43%, medium mines account for 22%, small mines account for 35%, and more than 94% of the reserves are concentrated in large mines, and medium and small mines account for only 5%. Among the large mines that have been used and can be used in the near future, there are 16 with large reserves of more than 200 million tons, which concentrates 71% of the total reserves. The largest is the Su grade mine in Etuke Banner, Inner Mongolia, with 3.2 billion tons of D-grade reserves; the largest is the Zhoucun hard gypsum mine in Nanjing, Jiangsu Province, with 340 million tons of B-grade reserves.
China's gypsum ore types are complete, but high-quality ore (fiber gypsum) is less. In the retained reserves, the mineral reserves of hard stone deposits account for 60%, and the mineral reserves of stone deposits account for 40%(of which: fiber gypsum accounts for 2%, ordinary gypsum accounts for 20%, and the rest are argillaceous gypsum, hard stone and carbonate stone, accounting for 18%). However, in the mineral areas that have been used and can be used in the near future, gypsum deposits are the main deposits, accounting for 80% of its reserves, and hard rock deposits only account for 20% of its reserves.
