Lowest Cost Hayes Black Diamond Polish Coal in Ireland. This has always been our "flagship product". Known by our customers as "The Mercedes of Coal" sold at the Dandys at Skoda prices. This is Premium grade coal which gives a high heat output and low ash content and is very suitable for use in both Stoves and open fires. This coal from Poland is a very stable product in our range and would be one of our top selling lines. This product should not be confused with Bord Na Mona Black Diamond brand. Our Customers regularly tell us that they have found Hayes Black Diamond Coal to be a much superior product to the Bord Na Mona version of Black Diamond and based on anecdotal evidence, we have found this to be true. This Coal is available in both 40 Kg bags from our yard in Derrynoose or available in 20kg bags which are for delivery on One Ton pallets to households all around the country. This is a very consistent quality coal which has had very positive feedback for years from our customers who return time and time again for it. We would recommend that you use slack on top of coal in an open fire, and use singles on top of coal on a stove to keep the fire in at night.