Fluorescense in granite

[fuss]

My wife did not appreciate the scratch or acid testing done on this specimen...though the UV test we both found very interesting....This is actually a sample of our kitchen counter, kidding about the first two tests..noticed the bright green fluorescence while showing her a different fluorescent rock on the counter. Any idea on what the mineral is? the photos show a rough edge that has no sealer or any thing else that I can tell on it. Thx. UV is 365nm LV.

 

Amazon Forum Fav 👍

Agony and Death on a Gold Rush Steamer: The Disastrous Sinking of the Side-Wheeler Yankee Blade - Grab it through Amazon!

[Jim in Idaho]

What spectrum of UV light were you using, Fuss? Knowing that helps on ID'ing the mineral.
Jim

 

[fuss]

Long wave 365 nm filtered. Thx.

 

[smokeythecat]

Hyalite opal will do that as will uranium.

 

[stdenis_jd]

haha, just wait until you tell your wife it's uranium

true story though...typically uranyl nitrate, most commonly fluoresces green in short wave but can fluoresce in 365nm. That is the most likely element fluorescing. Freak her out first, then let her know it isn't radioactive lol

 

[fuss]

Thx that just sealed the deal on buying a Geiger counter.....lol

haha, just wait until you tell your wife it's uranium

true story though...typically uranyl nitrate, most commonly fluoresces green in short wave but can fluoresce in 365nm. That is the most likely element fluorescing. Freak her out first, then let her know it isn't radioactive lol

 

[fuss]

Its a good excuse to spend the money on one..lol

 

[KStateKing]

I wanna know how you took those pics...

 

[stdenis_jd]

I wanna know how you took those pics...

Me too...I never get that kind of clarity/resolution on my UV pics

 

[fuss]

I would have to make a video tutorial to show how each shot is created, but the basics are, off camera lighting (strobe, speed light ,UV light source etc..), focus stacking technique (I don't have rails so rack the focus manually), quality macro lens 1:1, (I use a 150mm on a Nikon D810 body). That's the basic set up, then its off to Photoshop for image stacking, edits, crops, resizing etc..

I wanna know how you took those pics...

 

[fuss]

UV shots are tricky because instead of shooting at 1/200th sec with speedlight/strobes, shutter speeds drop to as low as 15 seconds each using the UV as a light source.

Me too...I never get that kind of clarity/resolution on my UV pics

 

[stdenis_jd]

Daaaaamn fuss you got the pic skills lol...I need to work on that myself

 

[KStateKing]

Yeah, there's def something to be said for camera quality. That Nikon is a rather LARGE step up from my god-only-knows-how-old Kodak.

 

[meMiner]

Great pic. I am jealous of your camera and photoshop skills.