CIBJO releases Gemmological Special Report: considers process of separating measurable facts from opinion; See Gemological Articles below.
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 Post subject: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sat May 12, 2012 9:49 am 
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Here is another great tutorial by Starla Turner



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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sat May 12, 2012 2:25 pm 
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Do you know what kind of flex lamp she is using ? :?:


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sat May 12, 2012 3:38 pm 
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They were available at the SGA conference....and I bought one.
Not expensive: under £20.
It's packed snugly away in my suitcase.
When I get home, I'll inspect it and post what I can about it.
Might be a Zelco Flex Light.......
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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Mon May 14, 2012 10:35 am 
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Yes, the light is Zelco, Long Reach Flexible Flashlight
Amazon carries them for $22.49
HERE


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Mon May 14, 2012 11:35 am 
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Thanks so much Barbra. :)


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Tue May 15, 2012 2:34 pm 
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The Gem-A supplies them as part of the student tool kit. You can probably buy them at the gem-A website as well. Nice pocket lamp


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sat May 26, 2012 10:22 am 
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I just added a link for Amazon on the left, they sell it for $19.95!


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Thu Mar 06, 2014 9:00 am 
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It is now $24


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Thu Mar 06, 2014 11:33 am 
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And still worth every penny. :D


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sat Mar 08, 2014 11:20 pm 
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Wow. On Amazon.ca it's a mere $60...
http://www.amazon.ca/Zelco-90003-Reach-Flexible-Flashlight/dp/B00006JJKZ

Meanwhile back on Amazon.com it's the expected $24... on sale for $22
http://www.amazon.com/Zelco-Long-Reach-Flexible-Flashlight/dp/B00006JJKZ

Aside from the slight change on the ".ca" to ".com" I have no rational explanation for the difference except the usual cross-border gouging. *sigh*

-Allan

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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sat Mar 08, 2014 11:47 pm 
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Man, that's outrageous!
I've heard the Canadian dollar has taken a bit of a dip next to ours, but that is crazy.

I'm a member of "Prime" (no shipping charges) so I can order one for you and send it to Canada.
You can pay me back through Paypal
Just let me know.


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sun Mar 09, 2014 12:33 am 
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Joined: Mon Oct 17, 2005 10:56 am
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Location: The frozen north prairie :-/
Is it possible the difference in prices is because of the differences in the lights themselves? The light offered in Canada says it's a xenon bulb, while the light offered in the US says it's a Krypton bulb. Since I'm not up to snuff on the differences in light bulbs, I did a search and found this:

Krypton

Krypton bulbs are part of the halogen and incandescent family of bulbs. They are filled with krypton gas which allows a longer life span than the xenon bulb. Two drawbacks to krypton bulbs are that they do not burn as brightly as xenon bulbs and generate more heat.


Xenon

In contrast, xenon bulbs, filled with xenon gas, offer a brighter light output than the krypton bulbs. Their heat generation is minimal in comparison, allowing a more efficient use of power. In addition, the output light is whiter than the krypton bulb's production.


From these descriptions, I think I'd prefer the xenon bulb. Anyone here know if there really is a large enough difference to warrant the price difference and whether the spectrum would be effected? *cough, cough ... Gene ... cough, cough*

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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sun Mar 09, 2014 5:13 pm 
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Thanks for the offer Barbra, but I think I'll pass for now. I've got a reasonably good light and I probably shouldn't be buying more stuff :)

As for Krypton vs Xenon - for the bulb to vary $40 between the two types, methinks this is a red herring... I could imagine if they were something like those super-high-power projector lamps, but not a battery-powered flashlight.

It's one of those wonders of how an imaginary line impacts the real world!

-Allan

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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Mon Mar 24, 2014 1:14 pm 
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Barbra Voltaire wrote:
Here is another great tutorial by Starla Turner


Thank you very much for posting this video =D>
irfan


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 Post subject: Re: Using the Dichroscope Spectroscope, and Chelsea Filter
PostPosted: Sat Mar 21, 2015 12:23 am 
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Oh wow, I have been on this forum for all of 10 minutes and I already found useful info. Thanks!


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