Originally posted on Nature's Rainbows in 2018 by John Smith. In early September 2018, after it looked like my grandchildren’s parents were required to prepare for a U.S. Government shutdown on the first of October, I cancelled my plans to take the grandchildren to...
Esperite is one of the most difficult minerals to photograph. The bright yellow of Esperite is very close to the bright green fluorescence of Willemite. The two together general blow out the exposure on most every camera. Most of the time, the esperite tends to look...
This article was originally published on Nature’s Rainbow. Over the years I've had requests for lighting controllers that would allow us to remotely control our different wavelength lights, as well as cycle through the lighting automatically, turning them on/off at a...
Experiments on Ultraviolet Light and Fluorescence are performed by James Lincoln for the AAPT Films Project. Also explained are the three colors of UV and phosphorescence.
A good introduction to UVA (longwave), UVB (midwave), and UVC (shortwave). The focus of the video are the UV tubes or bulbs mostly used in the past as UV lights. With some considerations of uses and safety. Today, most of these lights are replaced by LEDs, in...
An old video with a quick explanation of the light spectrum and why 365nm is important to us as fluorescent mineral collectors (as well as filters) compared to 385nm LED lights (without filters). Of course this video is trying to sell something: a 365nm LED light for...
Dr. Beniamino Barbieri (of the Fluorescence Foundation) gave a lecture on the history of fluorescence. His slides are reposted here (w/ permission), where they can easily be found by our mineral folks. This was written mostly towards biologic fluorescence, but...
This article was originally published by Dennis Michael on Nature's Rainbow. My small hand-held short wave lamp is useful, but has its limitations. I was interested in a much more powerful light for display and photography. After some research and talking to...
A member asked a practical question: do all rubies fluoresce the same way, and if they do not, can weak fluorescence be predicted from the way a specimen looks in daylight? The answer is no on both counts. Rubies do not all fluoresce the same way. Some glow intensely,...
Although not specifically fluorescent mineral oriented, these graphics are a great illustration of how our rocks are created. Just add some activators into the cycle and we have fluorescent rocks!Processes that shape the earth's surface are ongoing, continuously or...