The amount of what substance in granite determines its color?

More Questions:

Who is credited with inventing the AeroPress?

What game introduced the characters Raiden, Liu Kang, and Sub-Zero?

What event in a decathlon takes the athletes to the greatest height?

What modern sport grew out of the ancient Thai sport Muay Thai?

Writer Miguel de Cervantes was from which country?

In which US state is Puget Sound located?

What is the only waterfall on the entire length of the Mississippi River?

What element is combined with iron to become steel?

Who played Jane Fonda's love interest in the movie "On Golden Pond"?

Who has been played in a movie by both John Gavin and Rex Harrison?

What was Longacre Square renamed to in 1904??

What is the deadliest jellyfish in the world?

Whose military autobiography was titled "Crusade in Europe"?

Which major lake is near the Ponderosa Ranch in the TV show "Bonanza"?

What kind of creature was Sam on "The Muppet Show"?