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logo main
  • Testing
    • How to submit

      Please click on the button below to get all the necessary information for your testing inquiries.

      How to submit
    • Quick links
      • Pricing
      • Digital order form
      • Download order form (pdf)
      • Small diamond order form (pdf)
      • On-site testing
    • Reports
      • Verify a SSEF report
      • Understanding a SSEF report
      • SSEF Premium reports
      • GemTrack™
      • Age Dating
      • DNA Fingerprinting
    • More info
      • Coloured Gemstones
      • Diamonds
      • Pearls
      • Small Diamonds
      • Jewellery
  • Education
    • Gemmological courses

      Please click on the button below to discover SSEF’s gemmological course options, calendar and prices.

      Discover our courses
    • Course options
      • Basic Gemmology
      • Basic Diamonds
      • ATC Coloured Gemstones
      • ATC Gems & Jewellery
      • Advanced Pearls
      • Advanced Small Diamonds
      • Scientific Gemmology Course
    • More courses with us
      • Understanding Gemstones – Free Online Courses by SSEF
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2019

Sapphires Heated with Pressure – A Research Update

Sapphires Heated with Pressure – A Research Update. Published in InColor, Spring 2019, 86-90.

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Authors

  • C. Dunaigre
  • C.C. Milisenda
  • D. Schwarz
  • E. Gambini
  • G. Choudhary
  • L. Kiefert
  • L.E. Cartier
  • M.S. Krzemnicki
  • R.W. Hughes
  • S. Kim
  • S. McLure
  • T. Leelawatanasuk
  • Y. Horikawa
Research Articles
SapphireTreatments
2006

Sapphires from New Zealand

Sapphires from New Zealand. Published in 2006. Author(s): L. Kiefert, M.S. Krzemnicki, G. Du Toit, R. Befi, K. Schmetzer

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Authors

  • G. Du Toit
  • K. Schmetzer
  • L. Kiefert
  • M.S. Krzemnicki
  • R. Befi
Research Articles
OriginsSapphire
2005

X-ray luminescence, a valuable test in pearl identification

X-ray luminescence, a valuable test in pearl identification. Published in Journal of Gemmology, 2005. Author(s): H.A. Haenni, L. Kiefert, P. Giese

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Authors

  • H.A. Haenni
  • L. Kiefert
  • P. Giese
Research Articles
Pearl
2004

Asterism in beryl, aquamarine and emerald- an update

Asterism in beryl, aquamarine and emerald- an update. Published in Journal of Gemmology, 2004. Author(s): K. Schmetzer, L. Kiefert, H.A. Haenni

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Authors

  • H.A. Haenni
  • K. Schmetzer
  • L. Kiefert
Research Articles
EmeraldGemmologyOther Gemstones
2004

Ein neues Instrument für die analytische Gemmologie: LIBS

Ein neues Instrument für die analytische Gemmologie: LIBS Author(s): H.A. Haenni, M.S. Krzemnicki, L. Kiefert, J.-P. Chalain

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Authors

  • H.A. Haenni
  • J.-P. Chalain
  • L. Kiefert
  • M.S. Krzemnicki
Research Articles
MethodsTreatments
2004

Synthetic Verneuil corundum with unusual color zoning

Synthetic Verneuil corundum with unusual color zoning. Published in Gems & Gemology, 2004. Author(s): L. Kiefert

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Authors

  • L. Kiefert
Research Articles
Other Gemstones
2003

Verschiedenfarbige Bernsteine aus dem Baltikum

Verschiedenfarbige Bernsteine aus dem Baltikum. Published in 2003. Author(s): L. Kiefert

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Authors

  • L. Kiefert
Research Articles
Organics
2003

“Rainbow calsilica”

“Rainbow calsilica”. Published in GAHK Journal, 2003. Author(s): L. Kiefert

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Authors

  • L. Kiefert
Research Articles
Other Gemstones
2003

Der Stein des Regenbogens: “Rainbow Calsilica”

Der Stein des Regenbogens: “Rainbow Calsilica”. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft by Kiefert et al. in 2003. Author(s): L. Kiefert

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Authors

  • L. Kiefert
Research Articles
Other Gemstones
2003

Nulla parte mirabilior: Zur Verwendung von Edelsteinen in der Antike

Nulla parte mirabilior: Zur Verwendung von Edelsteinen in der Antike. Published in 2003. Author(s): S. Haeberli, L. Kiefert

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Authors

  • L. Kiefert
  • S. Haeberli
Research Articles
Gemmology

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