Here's a quick video of burning some coal that I got from RR Coal in Lykens, Dauphin County, PA. This is mined from the western edge of the southern field, near the Dauphin/Schuylkill county line. According to the PA DCNR coal maps, this would be semi-anthracite. This seems to be the case, as I've never seen anthracite make yellow flames like this stuff does. It also has a more noticeable sulfur smell when it burns. It seems to burn well, it doesn't clinker too much for a red ash coal, and the amount of ashes it generates isn't too bad.
I was burning UAE harmony (the old deep mined UAE) prior to this. In comparison, when loading fresh coal, the RR's higher volatile content is very noticeable by the intensity of the flames coming from the secondary combustion ports. I'm satisfied with it at $170/ton.http://youtu.be/sZNFBfTCLsI