Torbernite

Detailed Description
Torbernite is a copper phosphate mineral that contains uranium, making it somewhat radioactive. Although it can be used as a uranium ore, it's more valued as a collectors mineral. It can be used as a good indicator of uranium deposits, however.
Sample provided by Carlin Green, USGS. Sample originated from Musonoi Mine, Democratic Republic of the Congo, and is 5.0cm in size.
Sources/Usage
Public Domain.
Public Domain