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 Post subject: Re: GemmoRaman
PostPosted: Thu Sep 20, 2012 4:22 pm 
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Tim wrote:
Ok... MoDo and Lennie, I only see one solution... get married...

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 Post subject: Re: GemmoRaman
PostPosted: Fri Sep 21, 2012 7:10 am 
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Tim wrote:
Ok... MoDo and Lennie, I only see one solution... get married...


At least in my wifes opinon, I am!?!? :smt007 :smt054 :smt055 :smt060

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 Post subject: Re: GemmoRaman
PostPosted: Fri Sep 21, 2012 11:09 am 
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It wasn't anything against you, Lennie ... I don't think my Hubby would appreciate Tim's suggestion :P .

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 Post subject: Re: GemmoRaman
PostPosted: Fri Sep 21, 2012 12:15 pm 
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ahem............pardon.........just to come back to GemmoRaman, if someone of you got a FB profile, we would really appreciate a "like" on the unit page.... :D ..........just search for GemmoRaman-532.......

thank you all for the collaboaration :D
now MoDo and Lennie can start to nagging each other again........ :lol: :lol: :lol:

ciao
alberto

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 Post subject: Re: GemmoRaman
PostPosted: Sun Sep 23, 2012 11:52 am 
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Congratulations. Excellent work.

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 Post subject: Re: GemmoRaman
PostPosted: Mon Sep 24, 2012 10:16 am 
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Fabulous and awesome! Bringing one to London so we can all oooh and aaah over it?


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 Post subject: Re: GemmoRaman
PostPosted: Mon Sep 24, 2012 12:04 pm 
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Yeah... and analyze everything on the dinner table!


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 Post subject: Re: GemmoRaman
PostPosted: Mon Sep 24, 2012 4:43 pm 
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yeah it's small enough, no one will notice
We will stay from sat. morning to monday evening so I'm sure we'll find time

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 Post subject: Re: GemmoRaman
PostPosted: Tue Sep 25, 2012 7:18 am 
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Alberto wrote:
now MoDo and Lennie can start to nagging each other again........ :lol: :lol: :lol:

ciao
alberto


I thought we were nagging Tim??? #-o :?:

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 Post subject: Re: GemmoRaman
PostPosted: Tue Sep 25, 2012 9:17 am 
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I guess we weren't nagging him properly? :P

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 Post subject: Re: Rutile inclusion in spinel?
PostPosted: Tue Sep 25, 2012 12:46 pm 
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OK...I was just referring to the inclusions and the observations that make it appear very inexpensive to me...No way for us to know anything for sure from an add like this...Only suspicions...

The Spectrum Analyzer that you posted is being used by my heat treating instructor...Ted Themelis of GemLab in Bangkok...Interesting equipment and I enjoyed seeing it work but I have to question if it's as reliable as they claim...Other factors could affect the spectrum and give false or perhaps overlapping readings???...For instance it was rather difficult to get a proper reading on a dark purple/blue color change Umba Sapphire that one of my friends brought back from Tanga Tanzania...It failed to show the Iron lines and the Chromium lines were non-distinct...A few more positioning test were necessary before the data corresponded with it's ID...Like any data it needs to be backed up with additional test but I would definitely like to have one...

Do you use one and if so how reliable does it appear??


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 Post subject: Re: Rutile inclusion in spinel?
PostPosted: Wed Sep 26, 2012 3:29 am 
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Hi,

Cut ThroatTraders wrote:
The Spectrum Analyzer that you posted is being used by my heat treating instructor...Ted Themelis of GemLab in Bangkok...


I think you're referring to another instrument. GemmoRaman-532 is officially on the market since less than a week.... :wink: .................. i can confirm Ted Themelis doesn't have it.

ciao
alberto

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 Post subject: Re: GemmoRaman
PostPosted: Wed Sep 26, 2012 4:10 am 
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From your description I believe the instrument you have used with Ted is UV-VIS-NIR spectrometer instead of Raman/PL spectrometer.

UV-VIS-NIR spectrometer is essentially digital version of spectroscope. It has many important uses in gemology and I'm using one myself on daily basis. It measures absorption or transmission of light and is able to give important information. However, it is not very suitable for direct material identification and like you described working with dark stones is sometimes very difficult.

Raman spectrometer records unique Raman scattering fingerprint for each material. Photoluminescence gives additional information about some minor elements or defects. For most gems Raman is diagnostic. PL is diagnostic in some cases just like UV-VIS-NIR spectrum. Overlapping between Raman spectra of materials is generally minimal but end species of some solid solution series can be very difficult or impossible to interpret.

I have written small article "Raman demystified" and suggest to read it if you would like to know more.

and, talk to your mentor…

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 Post subject: Re: GemmoRaman
PostPosted: Wed Sep 26, 2012 12:08 pm 
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Quote:
I have written small article "Raman demystified" and suggest to read it if you would like to know more.


And an excellent article and presentation it is.


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 Post subject: Re: GemmoRaman
PostPosted: Wed Sep 26, 2012 2:58 pm 
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Quote:
and suggest to read it if you would like to know more.


I'd say that's required reading for everyone on this board...


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