What metal impurity makes rubies red and emeralds green?

More Questions:

What raconteur and Topkapi star joked that he wanted his tombstone to read "Keep off the grass"?

What position did football hall-of-famer Joe Montana play?

What suspect in the standard game of Clue has the same name as a bird?

Which city staged the premier of "Gone with the Wind" that actress Hattie McDaniel couldn't attend due to her skin color?

Philosopher Hannah Arendt's most famous book is named for what man "in Jerusalem"?

In which country is the Great Sandy Desert located?

Harrisburg is the capital of which US state?

Which peninsula is Greece located on?

What is the fruit of the rose?

What tool did Charles Moncke invent?

What is the name of the rabbit in Bambi?

In the TV show "The Simpsons', in which foreign country did the Simpsons appear on a game show?

At the 2001 Oscars, what animal did Björk dress as?

Dendrochronology is better known as what?

Which composer wrote the classical piece "Messiah"?