A steaming cup of joe is an essential ingredient for getting my morning off to a great start. It's likely a part of your everyday routine, too. In fact, 3 in 4 Americans consume coffee on the daily.

While coffee drinks have enormous variety, there are only four core varieties of the bean itself. These are the ones to know and the nuances between them.

Add Yahoo as a preferred source to see more of our stories on Google. hands harvesting coffee cherries from the plant into a woven basket - S.I.A. Studios/Shutterstock Walking down the aisle of the ...