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August 8, 2018 By Thomas Kuehn

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June 17, 2018 By Thomas Kuehn

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June 17, 2018 By Thomas Kuehn

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Pragmatic Spectroscopy for Gemologists by Hanneman

February 2, 2011 By Thomas Kuehn

W. William Hanneman, Ph.D. has recently published a new book “Pragmatic Spectroscopy for Gemologists”.

Wolf & Hanneman
  • Part 1: Visible Range Spectroscopy
    • Video Spectroscopy
    • Reference Spectra
  • Part 2: Causes of Color
  • Part 3: Visible and Near IR Spectroscopy
    • GL Gem Spectrometer
    • Remote Operation
    • Selected Gemstones
  • Part 4: Typical Spectra of Colored Gems
  • Part 5: Typical Spectra of Colorless Gems
Pragmatic Spectroscopy for Gemologists
Wolf Kuehn and Dr. Bill Hanneman
Tucson, Arizona 2011
Order Online Book Cover

You can download Wolf Kuehn’s PowerPoint presentation  “GL Gem Spectrometer and Advanced Gem Testing” held at the Arizona Hotel during the “ISG Lab Updates and Reports” session on Friday, February 4 here (PDF); the video-clips can be watched at the GL Gem Spectrometer page or in the GLGemSpec support area.

Bill Hanneman has also made available for download his Diamond Cut Grading Simplified (PDF) approach; a simple method as good as any other grading system.

Filed Under: News

Welcome to Gemology World

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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