From which type of rock is marble formed?

Be careful to pick the correct countertops as a glass of red wine will stain limestone but not marble due to the porosity differential.

Good grief. I should have known the answer as Marble Colorado is not all that far away and I've been there a couple of times. Anyone visiting the state should see it. It supplied the marble to the Washngton Monument and many state Capitol buildings. Giant blocks of marble EVERYWHERE!

had no idea!!