They're minerals, Marie: 365nm UV

Location
Purgatory
Just went to a gem and mineral show and came back with this cute little rock made of Willemite/calcite. Quite a transformation!

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(UV image has blues dialed down and red dialed up a bit to make up for the fact that I'm not using 254nm UV for the reds, because I value my eyes :)
 
Really cool effect! Never knew this existed. Also I love the Breaking Bad reference in the title ;)
Thanks! I love turning people on to all this kind of stuff (especially my grandkids)! Here are four more from the vendor's booth (a darkened tent), absolutely no saturation boost and essentially RAW SOOC -> JPG:

This is a (much!) larger specimen than the 4" piece I got for $5 above, and under the correct combination of 254nm and 365nm UV light:

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Assorted glowy stuff:

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I thought this looked like Kryptonite:
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Just neat:

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This was at a different booth in daylight, so I had to boost the glow a bit. It's called Yooperite:

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Silicon detectors can get down to 330nm or so, if the coverglass permits it. I have to use a UV filter for my M9 to avoid UV light, which tends to be out of focus.
Most modern lenses cut out most UV. I have two special lenses for UV.

Are you photographing fluorescence? If so- should see some of this by eye.
 
Silicon detectors can get down to 330nm or so, if the coverglass permits it. I have to use a UV filter for my M9 to avoid UV light, which tends to be out of focus.
Most modern lenses cut out most UV. I have two special lenses for UV.

Are you photographing fluorescence? If so- should see some of this by eye.
Yep, this is all pretty much just as it looked.
 
Thankyou for the explanation! The images are beautiful.

I provided some filters to a researcher in Germany that block everything except UV- he gets some very interesting images. His images are UV- no visible light.


The UV-only filters are not common, I had found some in an old optics lab. He sent me a beautiful Beer Stein in return.
 
Thankyou for the explanation! The images are beautiful.
Thank you!
I provided some filters to a researcher in Germany that block everything except UV- he gets some very interesting images. His images are UV- no visible light.

Fascinating for sure, but mostly from the scientific perspective (not at all a put-down, I love that stuff!).
The UV-only filters are not common, I had found some in an old optics lab. He sent me a beautiful Beer Stein in return.
Beer Stein? I think I once went out with his sister! 😹
 
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