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You are here: Home / Research & Technology / Samples – GL Gem Raman

Samples – GL Gem Raman

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
Grossular, garnet main PL 697 and 701 nm
Gems with overlapping R.I. are quickly separated
Dramatic Raman signal improvement in strong fluorescent synthetic blue sapphire (Chatham) crystal using GLBPF and TEC
Heliodor (yellow beryl) with PL expanded
Andalusite
Chrysoprase, cabochon (jade simulant)
Apatite, neon-blue with PL expanded spectrum
Early synth. blue diamond shows PL (TEC) 693 and 694nm lines due to impurity Cr3+ (ruby)
Identificatiion of Jadeite and Detection of Polymer Treatment
Extremely rare Zektzerite confirmed with RRUFF database
Green Glass (paste)
In PL mode synthetic and natural spinel can be identified.

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Gemmology is the science about gemstones. One of the objectives of this website is to provide gemmologists from around the world with an opportunity to exchange information in a fast and efficient way. At the same time Gemology World can serve as a resource for the general public to learn more about gems, diamonds and jewellery. Gemstones have intrigued mankind since early times in … Read More

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