For the gem mining, you purchase a bucket full of rocks, sand, and other assorted debris. They come in three sizes--small, medium, and large. The medium, at $20, is a good value, both for the stones you find (some really good sizes), but also for the time it takes going through it.
After purchasing your bucket, you then sit in the mining area, where you have a wooden square screen (called a sift) that you run through running water with scoopfuls of rocks and stones in it.
The fun comes in the discovery of each scoopful you are working with. Do you have just rocks, or are there quartz, minerals, or gemstones? You mainly are looking for the darker stones, which are often tourmaline, sapphire, garnet, or other gemstones. But there are also "glassy" type stones--the quartz--that you may also find in your mining experience. There are also some native rocks and stones that you may find as well, such as Blue Iolite and pyrite (fool's gold).
Our day was capped by the fact that we found several large stones of a good size in mining that are able to be cut into gemstones for jewelry. There was a large piece of tourmaline (at approx. $150-300 a carat), with an expected size for us of at least two to three carats, possibly larger. There is a garnet that we will probably end up with a four to five carat gemstone. And then an amethyst that will yield a heart shaped stone of approximately three carats.
Staff are available to help you determine which stones you have found in mining that are worth having cut into gemstones, as well as helping you to identify the stones you have found.
The main location of Foggy Mountain Gem Mine (we were at a "branch") has a website here.