GL Gem Raman Samples

 

Spectral measurements with the GL Gem Raman are usually done using a focused beam on the table facet of the gemstone (unless otherwise noted); in some cases laser intensity had to be adjusted to avoid “overwhelming” of the Raman signal (detector saturation) caused by sample fluorescence. Measurements were obtained with or without TEC as indicated.

Apatite, neon-blue with PL expanded spectrum

Apatite, neon-blue with PL expanded spectrum

Grossular, garnet PL 697 and 701 nm

Grossular, garnet main PL 697 and 701 nm

Click on the images to see more detail

Gems with overlapping R.I. are quickly separated

Gems with overlapping R.I. are quickly separated

 

Sapphire Blue Chatham Crystal

Dramatic Raman signal improvement in strong fluorescent synthetic blue sapphire (Chatham) crystal using GLBPF and TEC

 

Heliodor (yellow beryl) with PL expanded

Heliodor (yellow beryl) with PL expanded

Heliodor RUFF
   
Andalusite

Andalusite

Chrysoprase, cabochon (jade simulant)

Chrysoprase, cabochon (jade simulant)

 
Early synth. (HPHT) blue diamond shows PL (TEC) 693 and 694nm lines due to impurity Cr3+ (ruby)

Early synth. blue diamond shows PL (TEC) 693 and 694nm lines due to impurity Cr3+ (ruby)

 PL Diamond
Identificatiion of Jadeite and Detection of Polymer

Identificatiion of Jadeite and Detection of Polymer Treatment

Extremely rare Zektzerite confirmed with RRUFF database

Extremely rare Zektzerite confirmed with RRUFF database

Green Glass (paste)

Green Glass (paste)

In PL mode synthetic and natural spinel can be identified.

In PL mode synthetic and natural spinel can be identified.

Vancouver, B.C. – December 1, 2011, October 20, 2012, February 21, 2013

Wolf Kuehn, B.A., M.A., Dipl.oec, F.G.A., F.G.G. – GLR&T Project Manager

© 2011 Gemlab Research & Technology, Vancouver, Canada – www.gemlab.ws

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