/r/FluorescentMinerals

Photograph via //r/FluorescentMinerals

Glowing rocks! [Best viewed in dark mode]

Fluorescent minerals emit colorful visible light when exposed to invisible ultraviolet light. Shortwave mineral lights, longwave LEDs, and even ordinary black lights can activate this luminescence.

Glowing rocks! Fluorescent minerals emit colorful visible light when exposed to invisible ultraviolet light. Shortwave mineral lights, longwave LEDs, and even ordinary black lights can activate this luminescence.

Rules

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  3. Pictures, discussion, and links about fluorescent mineral topics only (no sales talk)

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/r/FluorescentMinerals

9,221 Subscribers

5

Looking for UV light recommendations to find precious and/or semi-precious minerals for jewelry making.

Hello, all!

I’m looking for your personal thoughts and experiences regarding wavelength, brand, battery size and anything else you’d consider pertinent when searching for amber, agate, topaz, corundum, etc.

Locality and target minerals will change somewhat regularly as I like to travel and move a lot.

I’m leaning towards a rechargeable, filtered, UV-C flashlight and I have an ostensibly high budget of ~$500 for a well-built, ethically built tool. Also considering whether having a variety of wavelengths may be more beneficial.

Also pertinent: I try to buy US made products whenever possible and I don’t buy products from faceless overseas vendors whose operations aren’t transparent.

Thanks! Looking forward to hopefully hearing your thoughts.

9 Comments
2024/12/16
08:40 UTC

1

What are some good fluorescent light strips I could use on a book shelf?

2 Comments
2024/12/14
03:28 UTC

40

Some of my favorite red fluorescent minerals!

Going clockwise starting on top: smithsonite, strontium rich aragonite, rubies, tugtupite, spinel, and scapolite. Specimens were illuminated with shortwave and longwave UV.

2 Comments
2024/12/12
06:46 UTC

5

How to view fluorescence in fully lit room?

Edit: thanks a lot for your advice!

Hoping to go to a local gem, stone, and mineral shop soon. I don't think they'd be able to turn down the lights for me. Any tips as to viewing stones to determine fluorescence with my uv light in a lit room?

9 Comments
2024/12/09
01:36 UTC

5

Is there anyone from Hungary?

I want to find fluorescent minerals but dont know where to go and i would like some help.

15 Comments
2024/12/07
21:34 UTC

10

Museum exhibit- shortwave light options?

I work for a nature learning center and we received a large donation of minerals, several of which are fluorescent. I would like to develop an exhibit on mineral fluorescence.

I have a glass display case, and I am planning to paint the sides and back with black matte paint. What I'm running into are issues finding shortwave lights to mount in the display case, as well as what sort of protections need to be applied (either to the light or glass) to make it safe for the public to view. I would like the light to be able to be turned on easily by passerby (like through a corded switch) and automatically turn off after a set amount of seconds

Ideally, I would like a light that is battery powered OR corded that is not too bulky and under $250, and under 1.5 feet long. I've found a few things that would work, but they're all longwave and I think I need something that is shortwave to really get the most visible fluorescence out of these minerals. I greatly appreciate any advice you may have that can help me get started in the right direction.

Thanks!

16 Comments
2024/12/05
01:06 UTC

5

beginner question about 365nm UV lights

I want to buy my first uv light for gem hunting at beach and i dont know how many watts i need there is a lot of option like 3w 5w 15w 30w... Can you tell me which i need?

12 Comments
2024/12/04
22:09 UTC

20

Why is this calcite blue?

15 Comments
2024/12/03
18:30 UTC

36

Hardystonite (left), scheelite (middle), and agrellite (right) emitting UVA fluorescence upon exposure to UVC rays

Taken with full spectrum converted EOS M, 35mm f/3.5 lens, 350nm / 50nm bandwidth filter, and 255nm flashlight. The yellow-green hue of the hardystonite is indicative of shorter UVA wavelengths and the purple of the scheelite is indicative of longer UVA wavelengths.

6 Comments
2024/12/02
23:33 UTC

29

This really cool White Stilbite with Honey Calcite from Pune, India with fluorescent reversal!

White Stilbite and Honey calcite from Pune, India- Under longwave UV 365 nm filtered, the colours seem to swap! The white Stilbite turns honey-coloured like the calcite (doesn't show very well in the video but it is noticeable to the eyes) and the honey-coloured Calcite turns white like the hue of the Stilbite! Plus the bonus Calcite phosphorescence!

7 Comments
2024/11/26
10:23 UTC

37

Is it true that direct sunlight destroys the fluorescence in some fluorescent minerals?

12 Comments
2024/11/24
13:38 UTC

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