What black stone is the most common volcanic rock on Earth?

More Questions:

Before switching to the Euro, what was the monetary unit of Italy?

What space lies between Baltic Avenue and Reading Railroad on a standard Monopoly game board?

What businessman served as manager of the Atlanta Braves for one game in 1977?

What was William Shakespeare's hometown?

What was the name of the first space-ready orbiter of NASA's space shuttle program?

What is the shape of the Earth?

Do identical twins have the same fingerprints?

WHat is the astronomical term for three celestial bodies aligning?

John Carpenter's "Assault on Precinct 13" is an homage to what classic Howard Hawks western?

What building first appeared on the back of a $20 bill in 1928?

Which US president had a sign on his desk that read "The Buck Stops Here"?

What New York building, completed in 1931, was at the time the world's tallest?

What did the United Nations General Assembly designate 2017 as?

What meteorological significance is traditionally attached to cows lying down?

Who released the album "The 20/20 Experience" in 2013?