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Nature’s Rainbows is a non-commercial web site maintained entirely by volunteer hobbyists and contributors.  Our mission is to provide information about UV and luminescence, premium fluorescent mineral photos, and a fluorescent mineral database for the enjoyment of FL mineral collectors around the world.  Information on this web site is covered under a Creative Commons License.


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Glow Notes - Education Posts

The posts below are all posts in chronological order.   Blog posts may be narrowed by the five categories listed, or the entire list viewed by returning to the main GNB page above.  Page through posts using "Next Ten" links at the bottom of the page.

May 3, 2015

Friends don't let friends use crappy unfiltered 390nm flashlights.

This is an educational post, directed towards folks new to the hobby. There has been discussion in our FB group lately about using cheapie 39Xnm flashlights for fluorescent minerals. I am passionate abou...

May 2, 2015

A pet peeve of mine is honesty in advertising.  Over the past 3+ months I’ve seen companies advertising ever higher power Convoy type flashlights – usually with an LG LED. Every single one of these ads is misleading – I could say downright lies but my bet is that the f...

April 8, 2015

People new to the hobby of fluorescent minerals typically have a lot of questions about UV.  What is the difference between shortwave (SW), midwave (MW), and longwave (LW)?  Is UV light harmful?  What kind of bulbs/tubes/LEDs are needed to generate UV?  I came across a...

April 7, 2015

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...

April 6, 2015

To produce crystals at home is an interesting experiment and if they fluoresce,  could be “magic”.

Furthermore, it’s easy and cheap.

The only ingredient you have to use in big quantity is “patience”. Don’t expect to see crystals in a few hours.

Synthetic Fluorescent Halit...

March 10, 2015

The Ilímaussaq complex is one of the world's most fascinating igneous complexes. The abundance of rare elements has resulted in more than two hundred and twenty-five different minerals and many unique fluorescent mineral specimens. Thirty minerals were first discovered...

March 8, 2015

Hi, I'm FireViper, and I'm hoping to get other kids excited about fluorescent rocks and to teach them a little bit, so I'll be posting some videos on Youtube. Here's the first one, an introduction to fluorescent rocks showcasing some of my collection. Enjoy, like and s...

Glenn Waychunas

Mar 1, 2018

Normally I do not send around a report, but now that I have some responsibility with the FMS, I consider it a duty (and a nice one).  I have been going to the Tucson shows for 30+ years and have seen just about everything, but every year is a...

March 6, 2015

[NOTE: This is an archive of a Facebook post with a great discussion about the fluorescence of rubies]  "The chromium present in ruby causes a natural red fluorescence which is stimulated by both visible and invisible (ultraviolet) light. However, when a ruby contains...

Ultraviolation Fluorescent Mineral Only Show - "If it don't glow, you're at the wrong show"

March 4, 2015

Over the years most of the folks I meet in our hobby are old and retired (I'm one of the old ones).  We need yunguns to develop an interest so our hobby continues to grow and we have new blood around to carry our backpacks filled with rocks.

I came across a Youtube vide...

March 1, 2015

Published on Feb 20, 2017
A brief student documentary about the historic Sterling Hill Mining Museum. Not only is this mine one of the oldest dating mines in the United States, but it is also the Fluorescent Mineral Capital of the world. This film showcases the wonderf...

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