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
NGC is the acronym for the Numismatic Guaranty Corporation. NGC is one of the worldâs two upper echelon coin grading services, the other being PCGS (Professional Coin Grading Service).nvestors do not purchase coins based on those factors. Instead, savvy investors look for NGC coins that have a relatively low premium over the gold spot price, coins with a historical profit-to-loss ratio that favors profit and coins that have a steady and trackable resell market.