You are what you read…
A select bibliography of books and articles authored or coauthored by AGTA GTC staff


Photoatlas of Inclusions in Gemstones, Volume 2 by E.J. Gübelin and J.I. Koivula

 

 

 


Photoatlas of Inclusions in Gemstones by E.J. Gübelin and J.I. Koivula

 

 

 

 


Raman Spectroscopy in Archaeology and Art History coauthored by Dr. L. Kiefert

 

 

 

 


Ruby & Sapphire by R.W. Hughes

 

 

 

 


Handbook of Raman Spectroscopy coauthored by Dr. L. Kiefert

 

 

 

 


The MicroWorld of Diamonds by J.I. Koivula

 

 

 

 


Gems by Robert Webster (with chapters by J.I. Koivula and R.W. Hughes)

 

 

 

 


Glossary of Geology (with contributions from J.I. Koivula)

 

 

 

 


The GIA Diamond Dictionary (with contributions from J.I. Koivula)

 

 

 

 


Corundum by R.W. Hughes

Dr. Lore Kiefert – Laboratory Director

  • Schmetzer, K., Kiefert, L., Bernhardt, H.-J. & Burford, M. (2005) Gem-quality musgravite from Sri Lanka. Journal of Gemmology, Vol. 29, 281–289.
  • Kiefert, L., Chalain, J.-P. & Häberli, S. (2005) Case Study: Diamonds, Gemstones and Pearls: From the Past to the Present. Chapter 22 in: Edwards, H.G.M. & Chalmers, J.M. (Eds): Raman Spectroscopy in Archaeology and Art History. Royal Society of Chemistry, Cambridge, XXI + 476 pp.
  • Hänni, H.A., Kiefert, L., Chalain, J.P. & Krzemnicki, M.S. (2004) Are new sapphires from Sri Lanka diffusion-treated or not? Jewellery News Asia, March, pp. 88–90.
  • Kiefert, L., McLaurin Moreno, D., Arizmendi, E., Hänni, H.A. & Elen, S. (2004) Cultured pearls from the Gulf of California, Mexico. Gems & Gemology, Vol. 40, No. 1, pp. 26–38.
  • Kiefert, L. (2003) Rainbow calsilica. Journal of the Gemmological Association of Hong Kong. Vol. 24, pp. 41–46.
  • Schmetzer, K., Hainschwang, T., Bernhardt, H.-J. & Kiefert, L. (2002) New chromium- and vanadium-bearing garnets from Tranoroa, Madagascar. Gems & Gemology, Vol.  38, No. 2, pp. 148–155.
  • Kiefert, L. (2002) Emerald Treatments. The processes and how to recognize them. In: Emeralds of the World, ExtraLapis English No. 2, pp. 79–81.
  • Kiefert, L., Schmetzer, K. & Hänni, H.A. (2002) Russian synthetic moissanite. Ed.: Jehlicka, J. & Kühn, J.: Georaman 2002, 5th International Conference on Raman Spectroscopy Applied to the Earth Sciences, Prague, Czech Republic, June 12–15, 2002. In: Acta Universitatis Carolinae Geologica, Vol.  46, No. 1, pp. 40–41.
  • Schmetzer, K., Hainschwang, T., Kiefert, L. & Bernhardt, H.-J. (2001) Pink to pinkish orange malaya garnets from Bekily, Madagascar. Gems & Gemology, Vol. 37, No. 4, pp. 296–308.
  • Kiefert, L., Hänni, H.A. & Ostertag, T. (2001) Raman Spectroscopic Applications to Gemmology. In Handbook of Raman Spectroscopy, I.R.Lewis & H.G.M.Edwards (Editors), Marcel Dekker, Inc., New York, Chapter 11, pp. 469–489.
  • Kiefert, L. and Hänni, H.A. (2000) Gem-quality haüyne from the Eifel District, Germany. Gems & Gemology, Vol. 36, No. 3, pp. 246–253.
  • Kiefert, L., Hänni, H.A. & Chalain, J-P. (2000): Identification of gemstone treatments with Raman Spectroscopy. Optical Devices and Diagnostics in Materials Science. Andrews, D.L., Asakura, T., Jutamulia, S., Kirk, W.P., Lagally, M.G., Lal, R.B. & Trolinger, J.D. (Eds.), Proceedings of SPIE, Vol. 4098241-251.
  • Kiefert, L, Hänni, H.A., Chalain, J.P. & Weber, W. (1999) Identification of filler substances in emeralds by infrared and Raman spectroscopy. Journal of Gemmology, Vol. 26, No. 8, pp. 501–520.
  • Hänni, H.A., Schubiger, B., Kiefert, L. & Häberli, S. (1998) Raman investigations on two historical objects from Basel cathedral: The reliquary cross and Dorothy monstrance. Gems & Gemology, Vol. 34, No. 2, pp. 102–114.
  • Schmetzer, K. & Kiefert, L. (1998) The colour of Igmerald (I.G. Farbenindustrie flux-grown synthetic emerald). Journal of Gemmology, Vol. 26, No. 3, pp. 64–84.
  • Schmetzer, K., Kiefert, L., Bernhardt, H.J., Zhang, B. (1997): Characterization of Chinese hydrothermal synthetic emerald. Gems & Gemology, Vol. 33, No. 4, pp. 276–291.
  • Hänni, H.A., Kiefert,L., Chalain, J-P. & Wilcock, I.C. (1997) A Raman microscope in the gemmological laboratory: first experiences of application. Journal of Gemmology, Vol. 25, No. 6, pp. 394–406.
  • Kiefert, L. & Schmidt, S. Th. (1996) Some tanzanite imitations. Gems & Gemology, Vol. 32, No. 4, pp. 270–276.
  • Kiefert, L., Schmetzer, K., Krzemnicki, M.S., Bernhardt, H.J. & Hänni, H.A. (1996) Sapphires from the Andranondambo area, Madagascar. Journal of Gemmology, Vol. 25, No. 3, pp. 185–209.
  • Hänni, H.A., Kiefert, L. et al. (1996) How to identify fillings in emeralds using Raman spectroscopy. Jewellery News Asia, No. 145, pp. 154, 156.
  • Hänni, H.A. & Kiefert,L. (1994) AGEE hydrothermal synthetic emeralds. JewelSiam, Oct./Nov., pp. 80–85.
  • Kiefert, L. and Schmetzer, K. (1991) The microscopic determination of structural properties for the characterization of optical uniaxial natural and synthetic gemstones. Part 3: Examples for the applicability of structural features for the distinction of natural and synthetic sapphire, ruby, amethyst and citrine. Journal of Gemmology, Vol. 22, No. 8, pp. 471–482.
  • Kiefert, L. and Schmetzer, K. (1988) Morphology and twinning in Chatham synthetic blue sapphire. Journal of Gemmology, Vol. 21, pp. 16–22.
  • Kiefert, L. and Schmetzer, K. (1987) Blue and yellow sapphire from Kaduna Province, Nigeria. Journal of Gemmology, Vol. 20, No. 7/8, pp. 427–442.
  • Kiefert, L. and Schmetzer, K. (1987) Blaue und gelbe sapphire aus der provinz Kaduna, Nigeria. Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 36, No. 1/2, pp. 61–78.
  • Kiefert, L. and Schmetzer, K. (1986) Rosafarbene und violette sapphire aus Nepal. Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 35, No. 3/4, pp. 113–125.
  • Kiefert, L. and Schmetzer, K. (1986) Morphologie und zwillingsbildung bei synthetischen blauen sapphiren von Chatham. Zeitschrift der Deutschen Gemmologischen Gesellschaft, Vol. 35, No. 3/4, pp. 127–138.

Garry Du Toit – Laboratory Manager

  • Du Toit, G., Hughes, R.W., Koivula, J.I. (2006) Beryllium-treated blue sapphires.
  • Du Toit, G., Charoensrithanakul, S. et al. (1997) Lab report: Hydrothermal beryl update; surface diffused ruby; jadeite-quartzite cylinders; tissue graft cultured pearls’ melo melo pearl. JewelSiam, Vol. 8, No. 1, Feb–March, pp. 70–73.
  • Du Toit, G., Charoensrithanakul, S. et al. (1996) Lab report: Unusual agate; dyed garnets; red glass; hinge pearl; coated topaz; spessartine garnet. JewelSiam, Vol. 7, No. 6, Dec–Jan, pp. 58–62.
  • Du Toit, G., Charoensrithanakul, S. et al. (1996) Lab report: Sulfur inclusion in emerald; pyrite inclusion in emerald; treated jadeite boulder; Kashan-like inclusion scene in Vietnamese rubies; synthetic ruby with seed plate. JewelSiam, Vol. 7, No. 4, Aug–Sept, pp. 108–111.
  • Du Toit, G., Charoensrithanakul, S. et al. (1996) Lab report: Irradiated pink diamonds; pink garnets; bi-color synthetic quartz; melo melo pearl, cat’s-eye emerald. JewelSiam, Vol. 7, No. 3, June–July, pp. 72–76.
  • Du Toit, G., Charoensrithanakul, S. et al. (1996) Lab Report: Alexandrite; Green beryl crystal; Fashioned synthetic cubic zirconia crystals; Green triplet; Ban Houay Xai. JewelSiam, Vol. 7, No. 1, Feb–March, pp. 76-79.
  • Du Toit, G., Charoensrithanakul, S. et al. (1995) Lab Report: Moldavite; Raman update. JewelSiam, Vol. 6, No. 6, Dec–Jan, pp. 80–81.
  • Du Toit, G., Charoensrithanakul, S. et al. (1995) Lab Report: Cat’s eye blue sapphire; synthetic ruby crystal; irradiated orange star sapphire; cat’s-eye opal. JewelSiam, Vol. 6, No. 5, Oct–Nov, pp. 62–63.
  • Du Toit, G., Charoensrithanakul, S. et al. (1995) Lab Report: Synthetic flux rubies; color change sapphires; irradiated yellow star sapphire; synthetic hydrothermal ruby; hydrothermal synthetic aquamarine; resin filled jadeite carving. JewelSiam, Vol. 6, No. 4, Aug–Sept, pp. 106–110.
  • Du Toit, G., Charoensrithanakul, S. et al. (1995) Lab Report: Hydrothermal synthetic sapphire; polymer treated synthetic opal; pulled synthetic ruby, introducing Raman spectroscopy. JewelSiam, Vol. 6, No. 3, June–July, pp. 56–61.
  • Du Toit, G., (1995) Emeralds of Madagascar. JewelSiam, Vol. 6, No. 4, Aug–Sept, pp. 92–95.
  • Du Toit, G., Charoensrithanakul, S. et al. (1995) Lab Report: Ban Houay Xai. JewelSiam, Vol. 6, No. 1, Feb–March, p. 79.
  • Du Toit, G., Charoensrithanakul, S. et al. (1995) Lab Report: Cat’s eye blue sapphire; synthetic ruby crystal; irradiated orange star sapphire. JewelSiam, Vol. 6, No. 5, Oct–Nov, pp. 62–63.
  • Du Toit, G., Charoensrithanakul, S. et al. (1995) Lab Report: Synthetic flux rubies; color change sapphires; irradiated yellow star sapphire; synthetic hydrothermal ruby. JewelSiam, Vol. 6, No. 4, Aug–Sept, pp. 106–110.

John I. Koivula – Chief Gemologist

Richard W. Hughes – Gemological Administrator

Riccardo Befi – Staff Gemologist


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