The only coal dealer that has posted an analysis of the Anthracite coal they are selling is Pine Creek Coal Co. See: PINE CREEK COAL CO
The specs are obviously a cut and past that has obscured the column headings. I asked in that thread for them to re-post the specs more clearly. They have not. Perhaps you could telephone them or send them a private e-mail.
Most forum members just buy coal based on recommendation by others. I would not do this if I were buying trailer loads. I would want a quality specification that holds the coal supplier responsible. Right now it's like a take it or leave it purchase.
Here's what I would do if I were buying in tractor trailer load amounts. I would insist on a coal analysis directly from the coal breaker. Then I would enter into a contract with them as the seller. Upon delivery I would make two samples of the coal. Samples taken as prescribed by testing procedures. I would keep one sample. I would send the second sample back to the coal breaker. If the delivered coal is crap, I would have it tested and compared to the specification. If it is not as represented you now have some recourse to have the breaker make it right.
Many have bought coal by ordering coal from a breaker and upon delivery paying the driver. In a dispute who's the seller? Where did the contract of sale take place? Most likely were the money changed hands. Just too many questions for my engineering and legal mind to answer. What I've outlined is the way the PA government buys coal. If the coal turns out to be crap, they get it tested and compare it to specs. If it fails they don't pay and even require the seller to return it at his own expense. Sure there are lots of trusted coal breakers, but there are other coal sellers selling junk. How can you tell the difference?