What is the hardest known naturally occurring mineral?

More Questions:

Which types of pasta have a large cylindrical shape?

Who is credited with inventing the AeroPress?

What color jersey does the overall leader of the Tour de France wear?

What is the point scored immediately after deuce in tennis?

Whose paintings include "At the Moulin de la Galette" and "At the Moulin Rouge"?

A lock of what composer's hair was sold at one of Sotheby's Auctions?

Whose novel "Sweet Thursday" formed the basis for the 1955 Rodgers & Hammerstein musical "Pipe Dream"?

What part of the cinnamon tree becomes the spice?

Which is the largest whale?

Who is known as Lady Soul?

What is the profession of Jon Cryer's character on the TV show "Two and a Half Men"?

Who did Abraham Lincoln face in a series of debates in 1858?

Joe Louis became World Champion in which year?

Who recorded such songs as "Toys in the Attic" and "Angel", and also wrote music for the film "Armageddon"?

The town of Pisa lies in which Italian region?