The state mineral of Kentucky is Coal
Coal has been known in Kentucky for over 250 years and was probably used by the Native Americans prior to European settlement. According to the Kentucky Department of Mines and Minerals, 131 million tons of coal was mined in Kentucky in 2000; 62 percent was from underground mines and 38 percent was from surface mines.
Portal No. 31 Underground Mine Tour offers visitors a tour of an actual coal mine by rail car. Please note the season is April to November and check for any covid restrictions before showing up.
For many years The Clement Mineral Museum has offered a collecting trip to a Kentucky Fluorite location. When I checked their website there is no mention of a 2021 field trip but keep checking. This has been on my wishlist for years. They also host an annual mineral show.