There is something I call the "feldspar effect". When people first start collecting fluorescent minerals in the field they usually are amazed at the typical fluorescence of your average feldspar. As they gain experience and see more fluorescent minerals they realize th...

(Posted March 20, 2017) After a recent recurring discussion on the photography of Esperite, I posted an image I created several years ago. Someone asked how I did it, and because I documented what I did in an email discussion with Mark Cole, I am able to provide an alm...

Many minerals exhibit an “afterglow” when the UV light is turned off.  This glow can last for milliseconds or hours depending on the mineral.  Some are very bright while others are barely perceptible.  Examples of minerals that are well-known to often be phosphorescent...

Photographing esperite and other difficult fluorescent minerals