It depends, if it was taken off the "front" of the pile when the truck dumped it, it could have been some smaller pieces and fines and still be "lump" size coal. In that situation, you were just unfortunate enough to get the small percentage of fines and smaller pieces in the load. If a substantial portion of the pile was coal of this size, then no, it's not lump and you shouldn't buy from them. There are also a number of retail sellers and yards that dishonestly sell other decent bituminous coals as Kentucky coal to make a large profit, unfortunately, only kentucky coal burns as good as kentucky coal and even though some other coals are quite good, you could be getting taken advantage of. Try asking around and look for someone selling coal that has a good reputation for honesty. $210/ton in michigan for KY lump is a little on the low side and would seem to me to be a bit suspicious.