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 Post subject: Spectrum chart
PostPosted: Wed May 08, 2013 10:25 am 
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Does anyone know of a U.S. source for a color chart of gemstone
spectra including absorption bars?


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 Post subject: Re: Spectrum chart
PostPosted: Thu May 09, 2013 12:49 pm 
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Location: North Carolina
Its not a US location for charts you can buy but I found this web site very informative.

http://www.gemlab.co.uk/


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 Post subject: Re: Spectrum chart
PostPosted: Thu May 09, 2013 4:58 pm 
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Try punching the "Geminterest" button ion the left-hand side of this page. It's in French but can easily be used by non-Francophones and has excellent spectrum information plus much more.

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www.artcutgems.com


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 Post subject: Re: Spectrum chart
PostPosted: Mon May 13, 2013 6:13 pm 
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Thank you Facetnator and ROM. However, don't you find that those
sources are quite incomplete, and that both take an awful lot of
time to utilize? Since spectoscopes are supposed to be such useful
gem identification test instruments, it's very strange that not
even the instrument manufacturers seem to have come up with any associated charts. Probably,everybody who owns a spectroscope would be a ready customer, don't you think?
Wish I had the know-how to put it all together. Seems like it
might be a profitable venture!


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 Post subject: Re: Spectrum chart
PostPosted: Mon May 13, 2013 7:22 pm 
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Location: the Netherlands
Oh, but good manufacturers do...

They provide you with stuff at printing cost...

(had a quick look to see if you could pick it up a bit cheaper again, secondhand in the US:

Someone is trippin'

:shock:


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 Post subject: Re: Spectrum chart
PostPosted: Mon May 13, 2013 7:39 pm 
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Tim wrote:
Someone is trippin'

For sure. It's much more reasonable here: http://store.gia.edu/OPL_A_Students_Guide_to_Spectroscopy_p/0201146.htm

For $785 I'd sell my copy that's nicely signed by both Colin and Hillary (sorry Colin, the information's the same in the $18 version :lol: )

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 Post subject: Re: Spectrum chart
PostPosted: Mon May 13, 2013 11:51 pm 
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Mine isn't signed, but I did have it spiral-bound -- I'll sell it for $500 8) :lol: .

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 Post subject: Re: Spectrum chart
PostPosted: Tue May 14, 2013 3:46 pm 
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Joined: Sat Aug 06, 2011 10:43 pm
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Thanks to all who responded to my query.
I was pleasantly surprised, in particular, to learn about
the OPL book available from GIA (on special at $16.20
this month, incidentally), and have hastened to order one.
I bought an OPL student version spectroscope some
months ago from a different US source. Curiously, that source
made no mention of any such OPL book.


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