Profiles

Elena Deljanin, M.Sc., CGmA, FGA

• Considered an expert in the grading and classification of rough diamonds.
• Researcher on morphology of diamonds from different sources.
• Professional gemologist with extensive experience in scientific analysis of gemstones.
• Mineral and ore identification.
• Highly skilled in the use of traditional gem-testing instruments along with advanced spectrophotometers in detection of new diamond treatments (irradiation, HPHT)
• Experience on use of FTIR spectrometer for typing of diamonds and measuring amount of impurities in diamonds from Canada, China, Brazil, Russia, Western and South Africa.
• Instructor on “Rough diamond grading and evaluation program” in USA and Canada
• Master degree in Oceanography from St. Petersburg University , GIA Graduate Gemologist, Fellow of Gemmological Association of GB Diploma Program in Gemmology (FGA with distinction), Fellow of Canadian Gemmological Association

Publication and References

Rough Diamond Review (June 2004, November 2004), articles on “Interpreting Diamond Morphology” with three Russian mineralogists, V. Afanasiev, N. Zinchuk and V. Sonin.

13th European Diamond Conference, Italy (September 2004), abstract and poster on “Use of cathodoluminecsence techniques in study of gem-quality type II natural, HPHT treated and lab-created diamonds” with international team of scientists.

Canadian Diamonds (October 2004), article on “Polishing up on rough” with
B. Deljanin, Director of EGL USA Research.

Rapaport (December 2004), article on “IIb or not IIb-Blue diamonds-Natural, treated and laboratory created-examined with two analytical techniques” with Research Team at EGL USA group.

15th Goldschmidt Conference, May 2005, article on ”Kinetics of diamond oxidation at various oxygen fugacities” with Y. Fedorchuk, D. Canil, of Victoria University.

Daniel W. Campbell B.S., G.G., F.G.A.

Experience:

September 2021 – Present

Earth Treasures – Appraiser/Fine Jewelry Consultant

• Appraise all customers’ jewelry and watches.
• Generate New Purchase Certificates for items sold in store.
• Consider jewelry items offered for sale to Earth Treasures by customers.
• Provide gemological testing and diamond grading services.
• Provide training to all employees.
• Sell jewelry and watches.
• Act as jewelry and watch repair liaison between customers and bench jewelers.

February 2016 – August 2021

Hamilton Jewelers – Senior Gemologist and Jewelry Appraiser

• Appraise all customers’ jewelry, watches and coins.
• Generate New Purchase Certificates for items sold in store.
• Consider jewelry items offered for sale to Hamilton Jewelers by customers.
• Provide gemological testing and diamond grading services to customers and staff.
• Provide training to all employees in four NJ and FL stores.

January 2012 – February 2016

Jacqueline Waite, LLC – Independent Jewelry Appraiser and Consultant

June 2010 – April 2013

Simms Jewelers, Bedminster, New Jersey – Sales, Gemological Consultant

December 2008 – June 2010

Le Vian Corporation, Great Neck, NY – Director of Education

• Travelled throughout the United States selling jewelry at trunk shows.
• Provided gemological, product and sales training to sales associates across the United States.

April 1986 – June 2008

Gemological Institute of America, New York, NY

GIA Education

April 1997 – June 2008

Director of Education operations, administration and curriculum.

June 1993 – April 1997

• Manager of GIA Education in New York.
• Senior Instructor of the Graduate Gemologist Resident program, Extension classes and seminars including Diamond Fracture Filling, Detecting Enhanced Ruby, Emerald and Sapphire, Advanced Diamond Clarity Grading and Identifying Sophisticated Synthetics.

GIA Gem Trade Laboratory

July 1992 – June 1993

Identification Department

• Analyzed and tested colored stones, diamonds, pearls and art objects to determine their identities and to detect possible treatments.
• Responsible for the daily inventory of gems and jewelry to be tested.
• Contributed to Gems and Gemology, GIA’s research journal.

June 1991 – July 1992

Diamond Grading Laboratory

• Utilized color grading skills and implemented procedures found in the GIA colored stone grading system to evaluate and collect data on fancy colored diamonds.
• Graded diamonds for color, clarity, cut and carat weight.
• Acted as customer service liaison for the submission and analysis of stones to the Gem Trade Laboratory.

GIA Education

January 1988 – June 1991

Instructor of the Graduate Gemologist Resident program.

GIA Gem Trade Laboratory

April 1986 – January 1988

Graded diamonds, ranging in weight from 0.70 cts. to 60 cts., by evaluating their color, clarity, cut and carat weight.

Education:

August 1995 – June 1991

• Earned New York Licensed Private School Director’s License.
• Gemmological Association of Great Britain, London, England
• Received the Diploma in Gemmology, and was accepted as a Fellow of the Gemmological Association (F.G.A.).

July 1988

• Gemological Institute of America, New York, NY
• Completed the Colored Stone Grading Course with a 96% on the final exam.

December 1987

• Gemological Institute of America, New York, NY
• Completed the Pearl and Pearl Grading Course with a 100% on the final
  exam.

March 1986

• Gemological Institute of America, New York, NY
• Earned the Graduate Gemologist Diploma in residence.

June 1985

• University of Delaware, Newark, Delaware
• Received a Bachelor of Science Degree in Geology.

Memberships:

• Member of the Manhattan Chapter of Gemological Institute of America Alumni
• Certified Senior Member of the National Association of Jewelry Appraisers

Dr Lore Kiefert – FGA

Education:

1987, M.Sc. in Mineralogy, Mineralogical Institute, University of Heidelberg, Heidelberg, Germany

1996, Ph.D. in Environmental Sciences, Griffith University, Brisbane, Australia

Experience:

2022-present Owner of Dr. Lore Kiefert Gemmology Consulting, Gubelin Ambassador for Germany
2017-present Visiting and Temporary Professor, Gemology Education Center of Tongji University, Gems & Technological Material Lab of Tongji University, Shanghai, China.
2009-Sept 2020 Chief Gemmologist, Gübelin Gem Lab, Luzern, Switzerland.
2005-2009 Director, AGTA Gemological Testing Center, New York, USA.
1994-2005 Vice Director and Head of Coloured Stones Department, SSEF Swiss Gemmological Institute, Basel, Switzerland.
1989-1994 Research and teaching assistant of environmental sciences at Griffith University, Brisbane, Australia.

Scholarships

1989-1992 Gottlieb-Daimler-und-Karl-Benz-Scholarship
1989-1993 Griffith University Scholarship

Professional Services:

Editorial board member, Journal of Gemmology (2009-present)
Editorial board member, Gems and Gemology (2009-present)
Research paper reviews for Gems and Gemology, and Journal of Gemmology
Book reviews for Gems and Gemology, and Journal of Gemmology

Publications including some (not all) conference abstracts and Gem News articles (in chronological order)
1. Schmetzer, K. & Kiefert, L. (1986): Untersuchung eines Sapphir-Katzenauges aus Burma. – Z. Dt. Gemmol. Ges. 35, 105-111
2. Kiefert, L. & Schmetzer, K. (1986): Rosafarbene und violette Sapphire aus Nepal. – Z. Dt. Gemmol. Ges. 35, 113-125
3. Kiefert, L. & Schmetzer, K. (1986): Morphologie und Zwillingsbildung bei synthetischen blauen Sapphiren von Chatham. – Z. Dt. Gemmol. Ges. 35, 127-138.
4. Schmetzer, K. & Kiefert, L. (1987): Investigation of sapphire cat’s eye from Burma. – J. Gemm. 20, 346-349.
5. Kiefert, L. & Schmetzer, K. (1987): Pink and violet sapphires from Nepal. – Australian Gemmologist16, 225-230.
6. Kiefert, L. & Schmetzer, K. (1987): Blaue und gelbe Sapphire aus der Provinz Kaduna, Nigeria. -Z. Dt. Gemmol. Ges. 36, 61-78
7. Kiefert, L. (1987): Mineralogische Untersuchungen zur Charakterisierung und Unterscheidung natuerlicher und synthetischer Sapphire. – Diplomarbeit, Mineralogisch-Petrographisches Institut der Universitaet Heidelberg, 203 pp.
8. Kiefert, L. & Schmetzer, K. (1988): Blue and yellow sapphire from Kaduna Province, Nigeria. – J. Gemm. 20, 427-442
9. Kiefert, L. & Schmetzer, K. (1988): Morphology and twinning in Chatham synthetic blue sapphire. – J. Gemm. 21, 16-22.
10. Kiefert, L. & Schmetzer, K. (1989): Die mikroskopische Bestimmung struktureller Merkmale optisch einachsiger natuerlicher und synthetischer Edelsteine. Teil1: Theoretische Grundlagen und Beschreibung der Untersuchungsmethoden. – Goldschmiede und Uhrmacher Zeitung 87, H. 11, 105-112
11. Kiefert, L. & Schmetzer, K. (1990): Die mikroskopische Bestimmung struktureller Merkmale optisch einachsiger natuerlicher und synthetischer Edelsteine. Teil 2: Beispiele fuer die Anwendbarkeit struktureller Merkmale auf Probleme der Unterscheidung natuerlicher Smaragde von synthetischen, im Flussmittel- oder Hydrothermalverfahren gezuechteten Smaragden. – Goldschmiede und Uhrmacher Zeitung 88, H.1, 158-162.
12. Kiefert, L. & Schmetzer, K. (1990): Die mikroskopische Bestimmung struktureller Merkmale optisch einachsiger natuerlicher und synthetischer Edelsteine. Teil 3: Beispiele fuer die Anwendbarkeit struktureller Merkmale auf Probleme der Unterscheidung natuerlicher und synthetischer Saphire, Rubine, Amethyste und Citrine. – Goldschmiede und Uhrmacher Zeitung 88, H.2, 151-161
13. Schmetzer, K. & Kiefert, L. (1990): Spectroscopic evidence for heat treatment of blue sapphires from Sri Lanka – additional data. – J. Gemm. 22, 80-82.
14. Schmetzer, K. & Kiefert, L. (1990): Water in beryl – a contribution to the separability of natural and synthetic emeralds by infrared spectroscopy. – J. Gemm. 22, 215-223.
15. Kiefert, L. & Schmetzer, K. (1991): The microscopic determination of structural properties for the characterization of optical uniaxial natural and synthetic gemstones. Part 1: General considerations and description of the methods. – J. Gemm. 22, 344-354
16. Kiefert, L. & Schmetzer, K. (1991): The microscopic determination of structural properties for the characterization of optical uniaxial natural and synthetic gemstones. Part 2: Examples for the applicability of structural features for the distinction of natural emerald from flux-grown and hydrotermally grown synthetic emerald. – J. Gemm. 22, 427-438.
17. Kiefert, L. & 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. – J. Gemm. 22, 471-482
18. Kiefert, L., McTainsh, G.H., Nickling, W.G. (1992): Pretreatment techniques for particle-size analysis of dust samples from High-volume sampler filter papers. J. Sed. Petrology, 62, 729-731
19. Kiefert, L. & Page, D. (1993): The effect of small sample sizes on clay mineral identification. Poster presented at the 10th International Clay Conference, Adelaide, SA.
20. Kiefert, L., McTainsh, G. (1994): Clay minerals in East Australian dust. In: Churchman, G.J., Fitzpatrick, R.W., Eggleton, R.A. (Ed.): Proceedings of the 10th International Clay Conference, Adelaide, SA.
21. Hänni,H.A. & Kiefert,L. (1994): AGEE hydrothermal synthetic emeralds.- Jewel Siam Oct./Nov. 80-85.
22. Hänni,H.A. & Kiefert,L. (1995): AGEE hydrothermal synthetic emeralds.- Schweizer Uhren- und Schmuckjournal, 294-297 (D, F, E, Sp)
23. Kiefert, L. & McTainsh, G.H. (1996): Oxygen isotope abundance in the quartz fraction of aeolian dust: implications for soil and ocean sediment formation in the Australasian region. – Aust. J. Soil Res., 34, 467-473
24. Hänni,H.A., Kiefert,L. & Chalain,J-P. (1996): How to identify fillings in emeralds using Raman spectroscopy.- Jewellery News Asia, September, 154 – 156.
25. Hänni,H.A., Kiefert,L. & Chalain,J-P. & I.C. Wilcock (1996): Ein Renishaw Raman Mikroskop im gemmologischen Labor: Erste Erfahrungen bei der Anwendung.- Z.Dt.Gemmol.Ges. 45/2, 55 -70.
26. Hänni,H.A., Kiefert,L. & Chalain,J-P. (1996): First experiences of application: A Renishaw Raman microscope in the gemmological Laboratory. – Jewelry Circle’s Magazine, 40, 82 – 86.
27. Kiefert, L., Schmetzer, K., Krzemnicki, M.S., Bernhardt, H.J. & Hänni, H.A. (1996): Sapphires from Andranondambo area, Madagascar.- J. Gemm. 25, 3, 185 – 209.
28. Kiefert, L., Schmetzer, K., Krzemnicki, M.S., Bernhardt, H.J. & Hänni, H.A. (1996): Ein neues Saphirvorkommen im Süden von Madagaskar.- (Deutsche) Goldschiedezeitung, 9/96, 89 – 91 , Forts. 11/96, 73 – 77.
29. Kiefert, L., Hänni, H.A. & Chalain, J-P. (1996): Various applications of a Raman microscope in a gemmological laboratory. – Proc. 2nd Australian Conference on Vibrational Spectroscopy, 2-4 October 1996, Queensland University of Technology, Brisbane, Australia, p. 202-203.
30. Kiefert, L. & Schmidt, S. Th. (1996): Some Tanzanite Imitations. – Gems & Gemology, Vol. 32, No. 4, p. 270-276.
31. Kiefert,L., Hänni,H.A., & Chalain,J-P. (1996): First experiences of application: A Renishaw Raman Microprobe in the gemmological laboratory.- GEORAMAN-96, Institut des Matériaux de Nantes, Nantes, France, 10-12 June 1996. In: Terra abstracts. Abstract supplement No. 2 to TERRA nova, Vol. 8, p. 19.
32. Kiefert, L. & Hänni, H.A. (1996): Detection of fissure fillings in emeralds using a Raman microscope. – Proc. 2nd Australian Conference on Vibrational Spectroscopy, 2-4 October 1996, Queensland University of Technology, Brisbane, Australia, p. 73-74.
33. Hänni, H.A., Kiefert,L., Chalain, J-P. & Wilcock, I.C. (1997): A Raman microscope in the gemmological laboratory: first experiences of application.- J. Gemmol. 25, 6, 394 – 406.
34. Schmetzer, K., Kiefert, L., Bernhardt, H.J., Zhang, B. (1997): Characterization of Chinese Hydrothermal synthetic Emerald. Gems & Gemology, Vol. 33, No. 4, 276 – 291.
35. Schmetzer, K., Kiefert, L., Bernhardt, H.J., Zhang, B. (1997): Im Hydrothermalverfahren gezüchtete synthetische Smaragde aus China. Goldschmiedezeitung, Teil 1: Mai 1998, Teil 2: Juni 1998.
36. Chalain, J.-P., Hänni, H.A., & Kiefert, L. (1998): Determination des substances de remplissage dans les Èmeraudes.- in ”L’Emeraude”, Association Francaise de Gemmologie, Paris.
37. 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 & Gemmology, summer, 102 -114.
38. Schmetzer, K. & Kiefert, L. (1998): The colour of Igmerald (I.G. Farbenindustrie flux-grown synthetic emerald). – J. Gemm. 26, 64 – 84.
39. Schmetzer, K. & Kiefert, L. (1998): Zur Färbung von Igmerald (synthetischer Smaragd, hergestellt von der IG. Farbenindustrie). – Goldschmiedezeitung, in Vorbereitung, Sommer 1998.
40. Kiefert, L, Hänni, H.A., Chalain, J.P. & Weber, W. (1999): Identification of filler substances in emeralds by infrared and Raman spectroscopy. – J.Gemmol.26, 8, 501-520.
41. Schmetzer, K., Kiefert, L. & Bernhardt, H.-J. (1999): Multicomponent inclusions in Nacken synthetic emeralds. – J. Gemmol. 26, 487-500.
42. Schmetzer, K., Kiefert, L. & Bernhardt, H.-J. (2000): Purple to purplish red chromium-bearing taaffeites.- Gems & Gemology, Spring, 50-59.
43. Kiefert, L. (2000): Hauyn aus der Eifel – ein attraktiver Edelstein. – Z. Dt. Gemmol. Ges. 49, 2, 103-114.
44. Kiefert, L. & Hänni, H.A. (2000): Gem-Quality Haüyne from the Eifel District, Germany.- Gems & Gemology, Fall, 246-253.
45. 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.
46. Schmetzer, K., Gübelin, E., Bernhardt, H.-J. & Kiefert, L. (2000): Oriented inclusions in spinels from Madagascar. – J. Gemm. 27, 4, 229-232.
47. Kiefert, L., Schmetzer, K. & Hänni, H.A. (2001): Synthetic moissanite from Russia.- J.Gemmol.27, 8, 471-481.
48. Kiefert, L. (2001): Behandlungen von Smaragd. – Extra Lapis No. 21, Smaragde der Welt, 79-81.
49. Schmetzer, K., Hainschwang, T., Kiefert, L. & Bernhardt, H.-J. (2001): Pink to Pinkish Orange Malaya Garnets from Bekily, Madagascar. – Gems & Gemology 37, No. 4, 296-308.
50. 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 46, 1, 40-41.
51. Kiefert, L. (2002): Emerald Treatments. The processes and how to recognize them. – In: Emeralds of the World, ExtraLapis English No. 2, 79-81.
52. Schmetzer, K., Hainschwang, T., Bernhardt, H.-J. & Kiefert, L. (2002): New Chromium- and Vanadium-Bearing Garnets from Tranoroa, Madagascar. – Gems & Gemology 38, No. 2, 148-155.
53. Schmetzer, K., Hainschwang, T., Kiefert, L. & Bernhardt, H.-J. (2002): Rosa bis rosa-orangefarbene Malaya-Granate aus Bekily, Madagaskar. – Goldschmiedezeitung No. 6, 80-85.
54. Kiefert, L. (2002): Zuchtperlen vom Golf von Kalifornien, Mexiko. – Z. Dt. Gemmol. Ges. 51/2-3, 121-132.
55. Kiefert, L., Vandenabeele, P. & Hänni, J. (2002): “Rainbow Calsilica”. – In: Laurs, B. (Ed): Gem News International, Gems & Gemology. Vol. 38, No. 4, 360-362.
56. Schmetzer, K., Burford, M., Kiefert, L., & Bernhardt, H.-J. (2003): The first transparent faceted grandidierite from Sri Lanka. Gems & Gemology, Vol. 39, No. 1, 32 – 37.
57. Kiefert, L. (2003): An unusual star quartz. Gems & Gemology, Gem News International, Vol. 39, No. 3, 234 – 235.
58. Kiefert, L. (2003): Synthetic spinel with unusual inclusions. Gems & Gemology, Gem News International, Vol. 39, No. 3, 239 – 240.
59. Kiefert, L. (2003): Verschiedenfarbige Bernsteine aus dem Baltikum. – Rohm Zeit, No. 4, Nov. 2003, 20 – 21.
60. Kiefert, L. (2003): Rainbow Calsilica. Journal of the Gemmological Association of Hong Kong. Vol. 24, 41 – 46.
61. Kiefert, L., Hänni, J., Vandenabeele, P., Moens, L. & Hammer, V.M.F. (2003): Der Stein des Regenbogens: „Rainbow-Calsilica“. Z. Dt. Gemmol. Ges. 52/4, 151-162.
62. 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 2004, 88-90.
63. Schmetzer, K., Kiefert, L. & Hänni, H.A. (2004): Asterism in beryl, aquamarine and emerald – an update. J. Gemm., Vol. 29, 65-71.
64. Kiefert, L., McLaurin Moreno, D., Arizmendi, E., Hänni, H.A. & Elen, S. (2004): Cultured Pearls from the Gulf of California, Mexico. Gems & Gemol. 40, 26-38.
65. Kiefert, L., & Schmetzer K. (2004): Synthetic Verneuil corundum with unusual color zoning. Gems & Gemology, Gem News International, Vol. 39, No. 3, 234 – 235.
66. Schmetzer, K., Kiefert, L., Bernhardt, H.-J. & Burford, M. (2005): Gem-quality musgravite from Sri Lanka. – J. Gemm., Vol. 29, 281-289.
67. Schmetzer, K., Kiefert, L., Bernhardt, H.-J., Burford, M. & Gunasekara, D.P. (2005): Iron- and zinc-rich gem-quality taaffeites from Sri Lanka. – J. Gemm., Vol. 29, 290-298.
68. Schmetzer, K., Kiefert, L. & Bernhardt, H.-J. (2005): Four-rayed Star Beryl from Madagascar. – Canadian Gemmologist, Vol. 26, No. 1, 9-12.
69. Hänni, H.A., Kiefert, L. & Giese, P. (2005): X-ray luminescence, a valuable test in pearl identification. – J. Gemm., Vol. 29, 325-330.
70. Kiefert, L. & Du Toit, G. (2005): Cubic zirconia as rough sapphire imitation. – Gems & Gemology, Gem News International, Vol. 41, 362.
71. Kiefert, L. & Koivula, J.I. (2005): Emerald phantom crystal. – Gems & Gemology, Gem News International, Vol. 41, 351-352.
72. Kiefert, L. (2006): Fascination pearls: Natural, Cultured & Imitation Pearls. Prism, Newsletter of the American Gem Trade Association, Spring 2006, 14-16.
73. Schmetzer, K., Kiefert, L., Bernhardt, H.-J. & Burford, M. (2006): The variation of gemmological properties and chemical composition of gem-quality taaffeites and musgravites from Sri Lanka. – Aust. Gemmologist, Vol. 22, 485-492.
74. Kiefert, L., Krzemnicki, M.S., Du Toit, G., Befi, R. & Schmetzer, K. (2006): Sapphires from New Zealand. Proceedings of the 4th International Gemological Symposium & GIA Gemological Research Conference, August 2006. Gems & Gemology, Vol. 42, 113-114.
75. Befi, R., Kiefert, L., and Htut, M. (2006): Coated Topaz. Proceedings of the 4th International Gemological Symposium & GIA Gemological Research Conference, August 2006. Gems & Gemology, Vol. 42, 128-129.
76. Du Toit, G., Mayerson W., van der Bogert, C., Douman, M., Befi, R., Koivula, J.I. & Kiefert, L. (2006): Demantoid from Iran. Proceedings of the 4th International Gemological Symposium & GIA Gemological Research Conference, August 2006. Gems & Gemology, Vol. 42, 131.
77. Kiefert, L., Befi, R., & Harlow, G.E. (2007): Surface Coating of Topaz. Paper presented at the 30th International Gemmological Conference, Moscow, Russia, 2007.
78. Kiefert, L. (2007): Alexandrite from the Malyshewo emerald mine in Russia. Zeitschrift der Deutschen Gemmologischen Ges., Vol. 56, 29-30.
79. Kiefert, L. (2007): Unusual Danburite Pair. Gems & Gemology, Gem News International, Vol. 53, 167-168.
80. Kiefert, L. (2009): The American Ban on Burmese Ruby, Implications for the Trade and Alternative sources. Proceedings of the 2nd International Gem and Jewelry Conference, 9-12 March 2009, Bangkok, p. 249.
81. Epelboym, M., Paralusz, S., Kan-Nyunt, H.-P., Circot, M. & Kiefert, L. (2009): The Characterization of Some Interesting Low Quality Natural Colored Diamonds. Proceedings of the 2nd International Gem and Jewelry Conference, 9-12 March 2009, Bangkok, pp. 118-120.
82. Epelboym, M., Paralusz, S., Kan-Nyunt, H.-P., Circot, M. & Kiefert, L. (2009): Picturesque Inclusions in Low Clarity Natural Colored Diamonds. American Gem Trade Association Prism, Winter 2009, 17-18.
83. Kiefert, L., Malsy, A. & Hardy, P. (2010): Unusual gemstone tapestry. Gems & Gemology, Gem News International, Vol. 46, No. 1, 71-72.
84. Karampelas, S.K. & Kiefert, L. (2010). Organic gems protected by CITES. InColor, Fall/Winter, Issue 15, pp. 20-23.
85. L. Kiefert, S. Karampelas (2011). Use of the Raman spectrometer in gemological laboratories: Review. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Vol. 80, No. 1, pp. 119-124.
86. Kiefert, L. and Douman, M. (2011). Gem News International: Ruby from Liberia. Gems & Gemology, 47(2), 128.
87. Kiefert, L. (2011): Large synthetic quartz. Gems & Gemology, Vol. 47, No. 4, Gem News International, pp. 332-333.
88. Hughes, R.W., Leelawatanasuk, T., Manorotkul, W., Kwok B, Kiefert, L. & Marshall, A. C. (2012): The Chinese Box: A Guangzhou Jade Market Puzzle. J. Gemm. Assoc. Hong Kong, Vol. 33, 50-53.
89. Kiefert, L. (2012): Unusual trapiche sapphire. Gems & Gemology, Vol. 48, No. 3, Gem News International, p. 229.
90. L. Kiefert (2012): Jade and jade-like materials, The GemGuide, September/October 2012, 1 + 4-7.
91. L. Kiefert (2013): Black Opal from Lightning Ridge, Australia. The GemGuide, May/June 2013.
92. Kiefert, L. & Groenenboom, P. (2013): Imitation Larimar. Gems & Gemology, Vol. 49, No. 2, Gem News International, p. 124
93. L. Kiefert (2013): L’opale nero di Lightning Ridge, Australia. Rivista Gemmologica Italiana, Vol. 7, No. 3, 167-169.
94. L. Kiefert, P. Hardy, H.-P. Kan-Nyunt & D. Nyfeler (2013): Downstream! Update on Mining Activities in the Mogok, Burma Area. The GemGuide, September/October 2013.
95. Hpone-Phyo Kan-Nyunt, Stefanos Karampelas, Klemens Link, Kyaw Thu, Lore Kiefert, and Pierre Hardy (2013): Blue Sapphires from the Baw Mar Mine in Mogok. Gems & Gemology, Vol. 49, No. 4, pp. 223–232
96. Kiefert, L., Hardy, P., Sintayehu, T., Abate, B. & Woldetinsae, G. (2014): New deposit of black opal from Ethiopia. Gems & Gemology, Vol. 50, No. 4, Gem News International, pp. 303-305.
97. Karampelas, S., Kiefert, L. & Xu, W. (2015): Large Cat’s Eye Emerald from Brazil. Gems & Gemology, Vol. 51, No. 2, Gem News International, pp. 200-201
98. Huber, B., Link, K., Kiefert, L. & Laurs, B. (2017): Borosilicate glass resembling gem crystals. – J. Gemm., Gem News, Vol. 35, No. 8, pp. 484-486
99. Zhou, C., Hodgkins, G., Lange, T., Saruwatari, K., Sturman, N., Kiefert, L. & Schollenbruch, K. (2017): Saltwater Pearls from the Pre- to Early Columbian Era: A Gemological and Radiocarbon Dating Study. Gems & Gemology, Vol. 53, No. 3, 286-295.
100. Elmaleh, E., Schmidt, S.Th., Karampelas, S., Link, K., Kiefert, L., Süssenberger, A. & Paul, A. (2019): U-Pb Ages of Zircon Inclusions in Sapphires from Ratnapura and Balangoda (Sri Lanka) and Implications for Geographic Origin. – Gems & Gemology, Vol. 55, No. 1, 18-28.
101. Krzemnicki, M.S., Cartier, L., Hughes, R.W., Leelawatanasuk, T., Kiefert, L., Choudhary, G., McClure, S., Milisena, C., Gambini, E., Kim, S., Schwarz, D., Dunaigre, C., Horikawa, Y. (2019): Sapphire Heated with Pressure – A Research Update. – InColor, Spring 2019 (Issue 42), 86-90
102. Kiefert, L., Wang, C., Sintayehu, T. & Link, K. (2019): Sunstone Labradorite-Bytownite from Ethiopia. – J. Gemm., Gem Notes, Vol. 36(8), 694-696
103. Kiefert, L. & Schollenbruch, K. (2020): Beschädigungen an Edelsteinen durch Reparaturlaser. Gold’Or, No. 1, 60-62
104. Xu, W., Link, K., Liu, C. & Kiefert, L. (2020): Age Determination of Zircon Inclusion in Kashmir Sapphire with U-Pb Dating. Journal of Gems and Gemmology, Vol. 22, No. 1, 1-12
105. Krzemnicki, M.S., Kiefert, L. & Schollenbruch, K. (2022): Damage caused to Gemstones by Lasers during Jewellery Repair. – J. Gemmol. Assoc. Hong Kong, Vol. 43, 23-27
Books
Karampelas, S., Kiefert, L., Bersani, D. & Vandenabeele, P. (2020): Gems and Gemmology. An Introduction for Archaeologists, Art-Historians and Conservators. Series Title: Short Introduction to Cultural Heritage Science. – Springer Nature Switzerland AG, Cham, 112 pp.

Book Chapters (in chronological order)

106. Kiefert, L., McTainsh, G.H. & Nickling, W.G. (1996): Sedimentological characteristics of Saharan and Australian dusts. In: Guerzoni, S. & Chester, R. (Ed.): The Impact of Desert Dust Across the Mediterranean. Kluwer, 183-190
107. 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, 469-489.
108. Häberli, S., Kiefert, L. (2003): Nulla parte mirabilior. Zur Verwendung von Edelsteinen in der Antike, Seite 30 – 34. In: Willers, D., Raselli-Nydegger, L.: Im Glanz der Götter und Heroen, Verlag Philipp von Zabern, Mainz am Rhein, Deutschland.
109. 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.
110. Schmetzer, K., with contributions of Bosshart G., Epelboym, M., Kiefert, L. & Malsy, A.-K. (2010): Russian Alexandrites. Schweizerbart Science Publishers, 141 pp.
111. S. Karampelas, L. Kiefert (2012). Gemstones and minerals, in: Analytical Archaeometry: Selected Topics (edited by H.G.M. Edwards and P. Vandenabeele), Royal Society of Chemistry publishing, pp. 291-317.
112. L. Kiefert, L., Epelboym, M., Kan-Nyunt, H. P. & Paralusz, S. (2012): Chapter 8b in Chalmers, J.M., Edwards, H.G.M. & Hargreaves, M.D. (Eds). Infrared and Raman
Spectroscopy in Forensic Science: Applications to the Study of Gems and Jewellery (pages 455-468), Wiley, Chichester.
113. Kiefert, L., Hardy, P., Schollenbruch, K. & Xu, W. (2018): New Case Studies: Diamonds, Jades, Corundum and Spinel. In: Vandenabeele, P. & Edwards, H. (Eds): Raman Spectroscopy in Archaeology and Art History. Royal Society of Chemistry, 2019, 254-270.

Book Reviews

114. Kiefert, L. (2001): Book Review: Farblose Farben: Farbe und Lumineszenz von Mineralien. Eine Einführung in die kristallchemischen und kristallphysikalischen Ursachen by G. Steffen. Nachrichten aus der Chemie, Vol. 49, No. 2, 191
115. Kiefert, L. (2007): Book Review: Gemmology, 3. Ed. by Peter G. Read. Gems & Gemology, Vol. 53, 185.
116. Kiefert, L. (2017): Book Review: Ruby & Sapphire – A Gemologist’s Guide by R. Hughes, W. Manorotkul, and E.B. Hughes. J. Gemm., Vol. 35, No. 6, 581-582.
117. Kiefert, L. (2019): Book Review: The Heat Treatment of Ruby & Sapphire: Experiments & Observations, 3rd Ed., Vol. 1: Attributes of Ruby-Sapphire and Related Heating Technology by Ted Themelis. J. Gemm., Vol. 36, No. 3, 263-265.
118. Kiefert, L. (2022): Book Review: Jade – A Gemologist’s Guide
Master’s Thesis
119. Kiefert, L. (1987): Mineralogische Untersuchungen zur Charakterisierung und Unterscheidung natuerlicher und synthetischer Sapphire. – Diplomarbeit, Mineralogisch-Petrographisches Institut der Universitaet Heidelberg, 203 pp.
Dissertation
120. Kiefert, L. (1995): Characteristics of Wind Transported Dust in Eastern Australia, Ph.D. Thesis, Griffith University, Nathan, Qld., Australia, pp. 324.

Randy Lightfoot – GG (GIA), CGA (AGS), CM (NAJA), RGA (ISG)

• Specializes as a Gemologist-Appraiser
• Skilled in using DF, CPF & UV to identify clues to diamond origin and treatment
• Extensively practices inclusion photomicrography and microscopy
• Highly knowledgeable in gemstone identification using standard non-destructive testing methods
• Speaker and lecturer (webinars, GIA graduation speaker, AGS Conclave)
• B.A. in Geology with an emphasis on volcanology, igneous petrology and mineralogy (2013)
• Volunteer diamond grading instructor for the GIA while employed as a diamond grader
• Part of the education, gem-sciences, and Young-Titleholder committees at the American Gem Society

Publication and References

AGS Spectra Magazine: Issue 3 2022: Cross Polarized Filters As A Clue To Diamond Origin, co-authored with AGS director of gemological services, Wade Abel

Diamonds 101 by Dusan Simic: co-contributor of diamond photomicrographs and screening explanations

National Association of Jewelry Appraisers: Frequent columnist to the NAJA Quarterly Newsletters (Q4 2021, Q1 2022, Q2 2022, Q4 2022)

John Chapman

John Chapman has a degree in physics and has been active in the diamond industry for over 30 years mostly working for Rio Tinto Diamonds in a technical capacity.  Since leaving the company he has been director of Gemetrix Pty which has developed and currently manufactures luminescence-based instruments to detect synthetic and treated diamonds and gems.  More recently the company has developed a compact system for both PL and visible absorption spectroscopy.

He is chief editor for the Mediterranean Gemmological and Jewellery Conferences, and editor of book “DIAMONDS: Natural, Treated and Laboratory-grown”.

John has also established Delta Diamond Lab that specialises in identifying the origin of pink diamonds.