GemmoRaman

[Barbara O. Ellis]

Ok... MoDo and Lennie, I only see one solution... get married...

[Lennie]

Ok... MoDo and Lennie, I only see one solution... get married...

At least in my wifes opinon, I am!?!?

[Barbara O. Ellis]

It wasn't anything against you, Lennie ... I don't think my Hubby would appreciate Tim's suggestion .

[Alberto]

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.... ..........just search for GemmoRaman-532.......

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

ciao
alberto

[neil]

Congratulations. Excellent work.

[Julie Gowans-Poli]

Fabulous and awesome! Bringing one to London so we can all oooh and aaah over it?

[Tim]

Yeah... and analyze everything on the dinner table!

[mikko]

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

[Lennie]

now MoDo and Lennie can start to nagging each other again........

ciao
alberto

I thought we were nagging Tim???

[Barbara O. Ellis]

I guess we weren't nagging him properly?

[Cut ThroatTraders]

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??

[Alberto]

Hi,

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.... .................. i can confirm Ted Themelis doesn't have it.

ciao
alberto

[mikko]

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…

[G4Lab]

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.

[Tim]

and suggest to read it if you would like to know more.

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