Old 04-19-2010, 06:58 AM #1
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Default Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

Hey guys!,
Had a good time recently walking through the Smithsonian Natural History Museum in Washington D.C specifically the gems and minerals exhibit and exposing the wide array of exhibitions to a 120mW violet laser to reveal fluorescence I had hoped to hit the Hope diamond but the way the diamond is exhibited makes that difficult to do without possibly hitting someone in the eyes lol. I hear it glows a bright orange too oh well here is a pic and a couple videos i shot to show off the effect better.


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Old 04-19-2010, 08:53 PM #2
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Default Re: Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

I would have rushed in the doors the second they open in the morning to get a shot at the Hope Diamond! Plus its unset for the first time ever on display! To see all 45.5 Carats of Hope Diamond phosphorescing a fiery 660nm red-orange. *drool* Simply brilliant. Unlike others that only fluoresce the Hope will even continue to glow for almost five minutes.

Wittelsbach-Graff diamond (left) & Hope diamond (right)

Was it still unset? Its new setting was to debut sometime this year.
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Last edited by HaloBlu; 04-19-2010 at 09:02 PM. Reason: $350 million
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Old 04-20-2010, 12:32 AM #3
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Default Re: Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

I can't help but think there is something wrong in doing this, but it looks so cool!
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Old 04-20-2010, 02:29 AM #4
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Default Re: Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

What could be wrong with the idea of blasting a few hundred mW of 405nm at the *cough*$350.million*cough* Hope Diamond? While I'm sure the museum would be less then pleased, Diamonds do have a uniquely high thermal conductivity.
The other gems & minerals might not like it as much.
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Last edited by HaloBlu; 04-20-2010 at 02:31 AM.
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Old 04-20-2010, 03:25 AM #5
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Default Re: Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

Let not forget the whole curse thing: A New Zealand newspaper article in 1888 described the supposedly lurid history of the Hope Diamond, including a claim that it was "said once to have formed the single eye of a great idol".

I'm not sure, but I don't think it would be a good idea to blind that eye!
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Old 04-20-2010, 08:42 PM #6
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Default Re: Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

Do all diamonds do this? And what about 473nm?
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Old 04-21-2010, 07:49 AM #7
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Default Re: Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

Nope most Diamonds will not glow red-orange, that is Very rare. How a Diamond reacts to UV depends on its type (based on chemical impurities). Most common type of Diamonds may fluorescence blue.
It has been found that Blue (Type IIb) Diamonds phosphorescence at 500nm (blue-green) & 660nm (red) under UV. BUT many appear pink or bluish Instead of red-orange because their red is overpowered by blue-green. So the Hope Diamonds red-orange glow is rare property among an already rare type of Diamond.
(Only 0.1% of Diamonds are Blue Type IIb)
wikipedia Diamond_type --- wikipedia Material_properties_of_diamond#Optical_properties --- Hope Diamond's Fiery Red Phosphorescence --- Unique Diamonds
Plus common Diamonds only fluorescence, the glow stops as soon as UV is turned off. Whereas phosphorescence will continue to glow.

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Last edited by HaloBlu; 04-21-2010 at 08:09 AM. Reason: Yep I certainly did go crazy with colors
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Old 04-21-2010, 08:28 AM #8
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Default Re: Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

cool I need to try that on some diamonds
I have a calcite type rock that continues to glow for a sec after hitting it in a nice orange color.
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Old 04-22-2010, 10:51 AM #9
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Default Re: Recent Trip To Wash DC Natural History Museum Fluorescent Gems!

Actually come to think of it, im in MD, not too far from the smithsonian Perhaps ill pay it a visit, I wanna see the hope glowing red-orange Im thinking of getting a phr and throwing together something real cheap(incase of confiscation) and having someone with the laser a few feet away, and ill be by the display with a camera like a normal tourist
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20mW rated 473nm PGL III-C outputing 55+mW and peaked at 96mWthanks Glenn!!
80mW rated 589nm PGL III-C
300mW rated 532nm PGL-III-C---Peak---450mW!!!

250mW labby from ebay---peaks near 300mW!


125mW viper DL-peak 188mW
50mW focusable ~Top laser 301-peak 44.12mW
Several modded pens 10 -30mW
*DIODE*
445nm diode pocket mini build, 700mA ~ 600mW---
445nm diode in 18650 kit---1.1A---1W

16X LCC chrome pckt mini, flex 500mA, outputting 303.2mW with G1
LOC with RKCSTR-- 434mA thanks FPyro-peak 305.1mW with G1
130mW 3.8mm diode pointer from moh-peak 140mW
635nm AtlasNova 5mW outputting 2mW
8X BH08LS20 diode in MX host 420mW with DFW lens thanks FPyro!!
SF-AW210 in jayrob pocket mini, flex drive 177mA~230mW with G1 glass
5mW ebaser with star cap puttin out 34mW
50mW focusable ~Top laser 302
200mW 808nm skylasers pointer-peak 291.2mW
*GAS*
Melles Griot He-Ne Bare Tube w/ mini PSU
JDS UNIPHASE 1508 Novette
Melles Griot Bare Tube HeNe w/ power supply
Cheap surplus Bare Tube HeNe
543nm Bare tube HeNe--Awesome tube!

Andover Holography LPM 1
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