silex
1.By the end of 1998, minerals that had been discovered, confirmed and explored included: cyanite, silex，quartz，xanthoconite, others that need proving up and exploring included: mica, phosphorite, diamond, rutile, crude oil, kalium ore, etc.
2.Huangmei has a rich reserve of underground minerals, 15 sorts are proven to have exploitation value, of which, limonite and siderite have a reserve of 58 million tons, the tenor is around 45%, being concentrated; quartz is of 100 million tons; gypsum mine is 270 million tons; barite is 500,000 tons and silex of 10 million tons; porcelain clay, limestone, shale and granite are extensively distributed and of large reserve.
