I bought 3 pallets of Schuylkill coal last year and burned 2 3/4 ton of it last year, which was my first year of coal burning. I have a Keystoker 105 burning rice. It seemed to burn well enough, but i really had nothing to compare it to. So i bought 10 bags of Blashak in the spring for a comparison. I thought the Blashak burned slightly hotter, but the biggest difference was the amount of ash produced. The Schuylkill coal generated much more ash, i would say almost a full ash pan for a 50 lb bag. Kind of large chunky ash with lots of bone or shale. The Blashak was a much finer ash and produced about half as much. Here are some pix of the Schuylkill coal, ash and burn from last year.
I bought Blashak this year but haven't started to burn it yet. I'm burning Schuylkill right now and will burn about 3/4 ton before switching over to Blashak. Are you getting the Schuylkill from Hocon in Torrington?