A blog of the photographs of Michael Popp who resides in an area around Louisville, Kentucky, USA. Click on the pictures to make them larger.
Monday, October 18, 2010
A picture of a piece of fluorite found during a mineral dig at The Ben E. Clement Mineral Museum. The piece in everyday light is rather plain but expose it to ultraviolet (UV) light (395 nm). UV light makes part of the mineral glow a whitish-yellow.