The amount of what substance in granite determines its color?

More Questions:

What is the only US state to boast a radio station whose call letters are the exact same name of the city?

Tony Drago is a snooker professional from which country?

Who was William Shakespeare's wife?

What famous historical figure turns out to be the disguised Black Knight in Sir Walter Scott's "Ivanhoe"?

Organic chemistry is centered around what two elements?

What is a male cat if a female is a queen?

What TV mystery series was set in the fictional town of Cabot Cove, Maine?

Who did Sigourney Weaver portray in the 1988 film "Gorillas in the Mist"?

What year was comedian Jon Stewart born?

When did actor Humphrey Bogart die?

After his trial, Michael Jackson fled Neverland Ranch for what island nation?

The Treaty of Ghent was signed in what country?

Who was the last British monarch to also be an emperor?

Which historical figure passed away on April 18, 1955?

What is the national animal of Scotland?