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Old 05-10-2011, 03:51 PM   #1
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Question What kind of rock is this???? crazy

Ran across this video, Might be old news IDK
It says it some kind of calcite...
I want some!!!!! anyone know what it is??? check this video out of a 405 hitting one, looks like it almost heats and cools the rock rapidly. I know its not, but looks that way

YouTube - Fluorescent crystal illuminated by 405nm BluRay laser


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Old 05-10-2011, 03:59 PM   #2
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Default Re: What kind of rock is this???? crazy

Someone already stated in the comments that is some kind of calcite.
There's a lot of fluorescent minerals out there, if you come across some don't forget to share some pics
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Old 05-10-2011, 04:03 PM   #3
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Default Re: What kind of rock is this???? crazy

Ya ive been noticing that there are while I was searching.. I work with rocks, on a drilling rig I look at the cuttings from 4-18,000ft down. Im going to start to shine my laser at samples.. See what happens..

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Old 05-10-2011, 04:25 PM   #4
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Default Re: What kind of rock is this???? crazy

It might be a big crack rock.
Pretty sweet.
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Old 05-10-2011, 05:05 PM   #5
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Default Re: What kind of rock is this???? crazy

Yep. Calcite. Lots of minerals react to UV light with fluorescence and/or phosphorescence.

Use a lower power violet laser. You do NOT want the "blaze" from the violet light to overpower the fluorescent reaction. Much of it is very subtle

De-focus it. You want to cover a bit more surface at least during discovery.

Shine your laser on lots of stuff. You will be surprised at how many things react. yellows, oranges, greens, whites, etc are all possible reactions

Be careful shining at "crystal" structures or broken or polished surfaces. The possibility for specular reflection is real

Peace,
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Old 05-10-2011, 06:23 PM   #6
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Default Re: What kind of rock is this???? crazy

I would go ahead and say, even after a these answers... Crack rock. For sure
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Old 05-10-2011, 06:39 PM   #7
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Default Re: What kind of rock is this???? crazy

Calcium mineral on a Quartz crystal.
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Old 05-10-2011, 06:43 PM   #8
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Default Re: What kind of rock is this???? crazy

Jake will also tell you crack tastes better when lit up with a laser. Take a vid with one of your own rocks, jake

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Old 03-03-2012, 02:27 AM   #9
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Default Re: What kind of rock is this???? crazy

Seen it myself with Calcite and Wellemite. Both undergo delayed fluorescence.
Also soda glass exhibits this kind of after glow as well.
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Old 03-03-2012, 03:55 AM   #10
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Default Re: What kind of rock is this???? crazy

Quote:
Originally Posted by jakeGT View Post
I would go ahead and say, even after a these answers... Crack rock. For sure
I've seen one the size of a small baseball. Its was pink and flaky inside.

And no, I never did crack. But I knew a lot of girls that did.

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Old 03-03-2012, 12:38 PM   #11
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Default Re: What kind of rock is this???? crazy

Quote:
Originally Posted by daguin View Post
Be careful shining at "crystal" structures or broken or polished surfaces. The possibility for specular reflection is real
Wear safety goggles... they also make the fluorescense more visible, as long as its in the red or orange part of the spectrum. You can see interesting fluorescent effects on all kinds of things - also lacquers and paints, although the usually fade faster than the rock in the video.
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Old 03-10-2012, 01:18 PM   #12
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Default Re: What kind of rock is this???? crazy

Thats calcite with cadmium sulfide or zinc silicate inclusions. Judging from the orange spectrum and long persistance.

See if you can find selenite from Northren Ohio on Ebay. Milky Selenite glows green for a long time after blue excitation.

Why did I say Ohio? Because the traces of ions in the mineral that cause the glow very from place to place. Willimite (Zinc Sulfide) from New Jersey glows like mad, yet if you get it from California, nothing...

I'm from Ohio, my Dad used to go hunting for Selenite.

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Old 03-10-2012, 02:42 PM   #13
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Default Re: What kind of rock is this???? crazy

This is one of my tests on a fluorescent mineral (fuchsite).



Here the relative thread Strange fluorescent phenomenon
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Old 03-10-2012, 05:43 PM   #14
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Default Re: What kind of rock is this???? crazy

Here is what he sais in the description:

''In reality the color is more pink than orange (and much more beautiful), but on the camera it appears orange.''

Jim
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Old 03-29-2012, 09:29 AM   #15
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Default Re: What kind of rock is this???? crazy

I'm going to have to go hit up the Utah rock shops up the road from me in Zion, and see what i can find out!!!
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Old 03-30-2012, 02:39 PM   #16
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Default Re: What kind of rock is this???? crazy

This is very cool. I wish I had a rock like that!
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