Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Stone classification: Diorite

Wall Number Sort descending Country State Source Description
5RB32 United States Colorado Monarch greenish-gray, fine grain
6RA32 United States Texas El Paso light greenish-gray, medium grain
7RA40 United States Montana Helena gray, medium grain
8Lb19 United States Pennsylvania Reading black and white-spotted, coarse grain, slightly porous
9RA40 United States Wyoming Raw Hide Buttes nearly black, fine grain, compact