Anthracite is a better type of coal than bituminous, anthracite is the best type of coal because it is the purest type of coal as it has the highest amount of carbon content p â¦ resent in it. It is made up of 90-95% of carbon content, so, it has a higher calorific value and burns without a smoke.
The NGC Coin Price Guide is a complete catalog of coin values for US and World coins from 1600 to date, compiled from a variety of numismatic sources. Sign In Join
THE NGC COIN GRADING SYSTEM. Once coins are entered into our database, they are barcoded and stored within NGC's vault until they are ready to be assessed by the NGC coin graders. Before grading, coins that will include variety designations are examined by a numismatist who specializes in variety attribution.