If you pick all the rock out of it, it will burn. The coal i got was nowhere near what the sample was i was given. To me that is fraud by misrepresenting a product you are selling. I was in contact with them about getting my money back and was told ok except for freight charges. I said fine. After a few emails i was totally ignored. I filed a complaint with the State Attorney Generals office in PA. I told him i was going to do that if i wasn't happy with a refund or somehow to work this out. He was saying "oh no, you don't have to do that". Well he should have honored his word. I filed a complaint a few months back. I finally got a response from the state and they said i was offered my money back but then stopped responding. This guy is a complete liar. I had to respond back to the state again and tell them Newport was the one whom stopped responding and i will not consider this resolved until i see a check. I urge anyone whom has dealt with this company to file a online complaint with the State Attorney Generals office in PA. Even if you bought 1/4 ton and it won't burn, your receipt says coal and the product delivered was not coal but a mix of stone shale and coal. http://www.attorneygeneral.gov/complaints.aspx?id=451
Here is a picture of how much stone out of a 5 gallon pail, i picked out by hand, i'm sure there was more but i didn't feel like spending more than a hour sorting.
When it is mixed with the coal, or when it is wet,it is black. I you hose it down and let it dry, the rock becomes much more visible.