Marble is best known for what it can be made into — incredible artworks or tacky ashtrays. But before it was that prized white-grey rock, marble was something a lot more pedestrian — limestone. For ...

Some of the world's most recognized statues are sculpted from it, and buildings from Birmingham to Washington, D.C. and beyond are clad with it. While many may think of Italy or Greece when it comes ...

When the British torched the U.S. Capitol in 1814, the search for the ideal stone to build a newer, more beautiful symbol of American democracy began with a carriage ride to Loudoun, Frederick, and ...

There are three types of rock found on Earth. These are igneous, metamorphic and sedimentary. Each rock type is formed in a different way. For example, the rock malachite is mostly made of the ...