• Cracking of Gem Opals.
  Boris Chauvire, Valentin Molle, Florine Guichard, Benjamin Rondeau, Paul Stephen Thomas and Emmanuel Fritsch.
  Minerals 2023, 13, 356
• Shortwave UV Blue Luminescence of Some Minerals and Gems Due to Titanate Groups.
  Maxence Vigier, Emmanuel Fritsch, Théo Cavignac, Camille Latouche and Stephane Jobic.
  Minerals 2023, 13, 104

• Cinnabar Inclusions in Ethiopian Opal.
  Feodor Blumentritt, Candice Caplan, Emmanuel Fritsch and Franck Notari.
  Journal of Gemmology 2022, 38, 217-219
• Synthetic sapphire with Rose channels.
  Ugo Hennebois, Aurelien Delaunay, Annabelle Herreweghe, Stefanos Karampelas and Emmanuel Fritsch.
  Gems & Gemology 2022, 58, 387-388
• More on Orange Luminescence in Corundum.
  Maxence Vigier and Emmanuel Fritsch.
  Gems & Gemology 2022, 58, 376-377
• Raman Spectroscopy of Zircon Inclusions in Unheated Pink Sapphires from Ilakaka, Madagascar: Opening New Perspectives.
  Stefanos Karampelas, Vincent Pardieu, Jean-Yves Mevellec and Emmanuel Fritsch.
  Journal of Gemmology 2022, 38, 16-18
• Photochromism and Photochromic Gems: A Review and Some New Data (Part 2).
  Feodor Blumentritt and Emmanuel Fritsch.
  Journal of Gemmology 2022, 38, 80-92
• Photochromic Scapolite from Baffin Island, Canada.
  Emmanuel Fritsch and Cassandre Moinard.
  Journal of Gemmology 2022, 38, 126-127
• Hyalite with Magnificent Internal Features.
  Ugo Hennebois, Aurelien Delaunay, Stefanos Karampelas and Emmanuel Fritsch.
  Gems & Gemology 2022, 58, 66-67

• Faceted Demantoid Garnet with Spectacular "Horsetail" Inclusions.
  Ugo Hennebois, Aurelien Delaunay, Stefanos Karampelas and Emmanuel Fritsch.
  Gems & Gemology 2021, 57, 384
• Photochromism and Photochromic Gems: A Review and Some New Data (Part 1).
  Feodor Blumentritt and Emmanuel Fritsch.
  Journal of Gemmology 2021, 37, 780-800
• Hematite Inclusions in Red Trapiche Quartz from Inner Mongolia.
  Emmanuel Fritsch.
  J. Gemmol. 2021, 37, 569-571
• Revealing the Formation Secrets of the Matryoshka Diamond.
  Emmanuel Fritsch.
  J. Gemmol. 2021, 37, 528-533
• Blue Persistent Luminescence (Phosphorescence) of Sodalite.
  Feodor Blumentritt, Maxence Vigier and Emmanuel Fritsch.
  J. Gemmol. 2021, 37, 571-574
• Point Defects Modeling Explains Multiple Sulfur Species in Sulfur-Doped Na-4(Al3Si3O12)Cl Sodalite.
  Adrien Stoliaroff, Romain Schira, Feodor Blumentritt, Emmanuel Fritsch, Stephane Jobic and Camille Latouche.
  J. Phys. Chem. C 2021, 125, 16674-16680

• Unravelling the Origin of the Yellow-Orange Luminescence in Natural and Synthetic Scapolites.
  Feodor Blumentritt, Camille Latouche, Yann Morizet, Maria-Teresa Caldes, Stephane Jobic and Emmanuel Fritsch.
  J. Phys. Chem. Lett. 2020, 11, 4591-4596
• Polygenic chamosite from a hydrothermalized oolitic ironstone (Saint-Aubin-des-Chateaux, Armorican Massif, France): crystal chemistry, visible-near-infrared spectroscopy (red variety) and geochemical significance.
  Yves Moelo, Emmanuel Fritsch, Eric Gloaguen and Olivier Rouer.
  Clay Minerals 2020, 55, 83-95
• Pink Axinite from Merelani, Tanzania: Origin of Colour and Luminescence.
  Maxence Vigier and Emmanuel Fritsch.
  Journ of Gemm 2020, 37, 192-205

• Raman spectroscopy of natural and cultured pearls and pearl producing mollusc shells.
  Stefanos Karampelas, Emmanuel Fritsch, Fatema Makhlooq, Fatima Mohamed and Abeer Al-Alawi.
  J. Raman Spectrosc. 2019, 51, 1813-1821
• Lasnierite, (Ca,Sr)(Mg,Fe)(2)Al(PO4)(3), a new phosphate accompanying lazulite from Mt. Ibity, Madagascar: an example of structural characterization from dynamical refinement of precession electron diffraction data on submicrometre sample.
  Benjamin Rondeau, Bertrand Devouard, Damien Jacob, Pascal Roussel, Nicolas Stephant, Constance Boulet, Valentin Molle, Marianna Corre, Emmanuel Fritsch, Cristiano Ferraris and Gian Carlo Parodi.
  European Journal of Mineralogy 2019, 31, 379-388

• Type IIa diamond with extraordinary etch channels.
  Aurelien Delaunay and Emmanuel Fritsch.
  Gems & Gemology 2018, 54, 66-67
• Faceted Blue Dumortierite from Madagascar.
  Emmanuel Fritsch, Aurelien Delaunay and S. Leblan.
  Journal of Gemmology 2018, 36, 94-95
• Boehmite needles in corundum are Rose Channels.
  Franck Notari, Emmanuel Fritsch, Candice Caplan and Thomas Hainschwang.
  Gems & Gemology 2018, 54, 257
• Bumble Bee Stone: A Bright Yellow-to-Orange and Black Patterned Gem from West Java, Indonesia.
  Emmanuel Fritsch and Joel Ivey.
  Journal of Gemmology 2018, 36, 228-238
• What Truly Characterises a Chameleon Diamond? An Example of an Atypical 25.85 ct Stone.
  Emmanuel Fritsch and Aurelien Delaunay.
  Journal of Gemmology 2018, 36, 142-151
• Reverse dichromatism in gem andalusite related to total pleochroism of the Fe2+-Ti4+ IVCT.
  Benjamin Rondeau, Sarah Chamard-Bois, Emmanuel Fritsch, Franck Notari and Boris Chauvire.
  Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy 2018, 204, 611-619
• Aluminium diboride-type structure in Ethiopian opal-CT revealed by fast Fourier transform.
  J -P. Gauthier, N. Stephant, B. Rondeau, J A. Cody and E. Fritsch.
  J. Appl. Crystallogr. 2018, 51, 27-34

• Raman spectra of gem-quality variscite and metavariscite.
  Emmanuel Fritsch, Stefanos Karampelas and Jean-Yves Mevellec.
  J. Raman Spectrosc. 2017, 48, 1554-1558
• Les dislocations dissoutes : Des inclusions pas toujours faciles a identifier. 2nde partie.
  M. Philippe and Emmanuel Fritsch.
  Revue de Gemmologie a.f.g. 2017, 12-16
• Nouvelle imitation de diamant brut en moissanite synthetique.
  Aurelien Delaunay and Emmanuel Fritsch.
  Revue de Gemmologie a.f.g. 2017, 15-16
• Les dislocations dissoutes : Des inclusions pas toujours faciles a identifier.
  M. Philippe and Emmanuel Fritsch.
  Revue de Gemmologie a.f.g. 2017, 11-22
• A Zoned Type IaB/IIa Diamond of Probable 'Superdeep' Origin.
  Aurelien Delaunay and Emmanuel Fritsch.
  Journal of Gemmology 2017, 35, 397-399
• Note on CVD Synthetic Overgrowth.
  Emmanuel Fritsch.
  Gems & Gemology 2017, 53, 368-368
• Why are some crystals gem quality? Crystal growth considerations on the "gem factor".
  Emmanuel Fritsch, Benjamin Rondeau, Bertrand Devouard, Lauriane Pinsault and Camille Latouche.
  Canadian Mineralogist 2017, 55, 521-533
• Comprehensive approach to simulate vibrationally resolved phosphorescence spectra of gold(III) complexes using DFT including temperature effects.
  Hayat Ayache, Dalila Hammoutene, Emmanuel Fritsch, Aziz Elkechai, Abdou Boucekkine and Camille Latouche.
  Theor. Chem. Acc. 2017, 136, 108
• Residual radioactivity of treated green diamonds.
  Philippe Cassette, Franck Notari, Marie-Christine Lepy, Candice Caplan, Sylvie Pierre, Thomas Hainschwang and Emmanuel Fritsch.
  Applied Radiation and Isotopes 2017, 126, 66-72

• L apparence d un verre !.
  A. Herreweghe and E. Fritsch.
  Revue de Gemmologie a.f.g. 2016, 10-11
• L Etoile du Sud, la vraie..
  Emmanuel Fritsch.
  Planète Jules Verne 2016, 61
• Propheties etonnantes et fallacies delirantes: le point de vue d un gemmologue.
  Emmanuel Fritsch.
  Planète Jules Verne 2016, 51
• Piege a gemmologue.
  S. Leblan, E. Fritsch, D. Louka and M. Philippe.
  Revue de Gemmologie a.f.g. 2016, 21
• Red cordierite from Madagascar.
  Emmanuel Fritsch, Benjamin Rondeau, Thierry Peclet, Patrick Lefebvre and Yves Lulzac.
  Gems Gemol. 2016, 52, 97-98
• Plastic deformation in natural diamonds: Rose channels associated to mechanical twinning.
  M. Schoor, J C. Boulliard, E. Gaillou, Hardouin O. Duparc, I. Esteve, B. Baptiste, B. Rondeau and E. Fritsch.
  Diamond and Related Materials 2016, 66, 102-106

• Canalicules et fractures roses dan une tourmaline de type « Paraiba ».
  S. Leblan, Emmanuel Fritsch, A. Droux and Olivier Segura.
  Revue de Gemmologie a.f.g. 2015, 9-10
• Justifying gem testing reports: the way labs can inform their customers.
  Olivier Segura, Emmanuel Fritsch and A. Droux.
  In Color 2015, 28, 24-26
• Un rubis vraisemblablement huilé.
  Emmanuel Fritsch and A. Droux.
  Revue de Gemmologie a.f.g. 2015, 4-6
• Nonbead-cultured pearls from Strombus gigas.
  Olivier Segura and Emmanuel Fritsch.
  Gems Gemol. 2015, 51, 201-202
• Green-Luminescing Hyalite Opal from Zacatecas, Mexico.
  Emmanuel Fritsch, Peter K M. Megaw, Tyler L. Spano, Boris Chauvire, Benjamin Rondeau, Michael Gray, Thomas Hainschwang and Nathan Renfro.
  Journal of Gemmology 2015, 34, 490-508
• NATURAL DIAMONDS MISTAKENLY IDENTIFIED AS NPD SYNTHETIC DIAMONDS.
  Thomas Hainschwang, Franck Notari and Emmanuel Fritsch.
  Gems & Gemology 2015, 51, 331-332
• Tucson 2015.
  Emmanuel Fritsch and Kenneth Scarratt.
  Gems Gemol. 2015, 51, 68-71
• Blue Spinel from the Luc Yen District of Vietnam.
  Boris Chauvire, Benjamin Rondeau, Emmanuel Fritsch, Phillipe Ressigeac and Jean-Luc Devidal.
  Gems Gemol. 2015, 51, 2-17

• New typology and origin of tsavorite based on trace-element chemistry.
  Julien Feneyrol, Gaston Giuliani, Daniel Ohnenstetter, Benjamin Rondeau, Emmanuel Fritsch, Anthony E. Fallick, Daniel Ichang'i, Edward Omito, Michel Rakotondrazafy, Madison Ranatsenho and Florent Lallier.
  Eur. J. Mineral. 2014, 26, 293-308
• Investigation of Hidden Periodic Structures on SEM Images of Opal-Like Materials Using FFT and IFFT.
  Nicolas Stephant, Benjamin Rondeau, Jean-Pierre Gauthier, Jason A. Cody and Emmanuel Fritsch.
  Scanning 2014, 36, 487-499

• Luminescence spectroscopy and microscopy applied to study gem materials: a case study of C centre containing diamonds.
  Thomas Hainschwang, Stefanos Karampelas, Emmanuel Fritsch and Franck Notari.
  Mineral. Petrol. 2013, 107, 393-413
• ON THE ORIGIN OF DIGIT PATTERNS IN GEM OPAL.
  Benjamin Rondeau, Jean-Pierre Gauthier, Francesco Mazzero, Emmanuel Fritsch, Yves Bodeur and Boris Chauvire.
  Gems Gemol. 2013, 49, 138-146
• The origin of color in natural C center bearing diamonds.
  Thomas Hainschwang, Emmanuel Fritsch, Franck Notari, Benjamin Rondeau and Andrey Katrusha.
  Diam. Relat. Mat. 2013, 39, 27-40

• A new defect center in type Ib diamond inducing one phonon infrared absorption: The Y center.
  Thomas Hainschwang, Emmanuel Fritsch, Franck Notari and Benjamin Rondeau.
  Diam. Relat. Mat. 2012, 21, 120-126
• Raman spectroscopy applied to Gemmology.
  Emmanuel Fritsch, Benjamin Rondeau, Thomas Hainschwang, Stefanos Karampelas, J. Dubessy, M C. Caumon and F. Rull.
  Applications of {Raman} {Spectroscopy} to {Earth} {Sciences} and {Cultural} {Heritage} 2012, 12, 455-489
• Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil.
  Benjamin Rondeau, Benedicte Cenki-Tok, Emmanuel Fritsch, Francesco Mazzero, Jean-Pierre Gauthier, Yves Bodeur, Eyassu Bekele, Eloise Gaillou and Dereje Ayalew.
  Geochem.-Explor. Environ. Anal. 2012, 12, 93-104
• The C center isolated nitrogen-related infrared absorption at 2688 cm(-1): perfect harmony in diamond.
  T. Hainschwang, E. Fritsch, L. Massi, B. Rondeau and F. Notari.
  J. Appl. Spectrosc. 2012, 79, 737-743
• COLORED STONES AND ORGANIC MATERIALS.
  Benjamin Rondeau, Jean-Pierre Gauthier and Emmanuel Fritsch.
  Gems Gemol. 2012, 48, 306-307

• UV-VIS-NIR REFLECTANCE SPECTROSCOPY OF NATURAL-COLOR SALTWATER CULTURED PEARLS FROM PINCTADA MARGARITIFERA.
  Stefanos Karampelas, Emmanuel Fritsch, Jean-Pierre Gauthier and Thomas Hainschwang.
  Gems Gemol. 2011, 47, 31-35
• ADVANCING THE UNDERSTANDING OF LUMINESCENCE IN GEM MATERIALS.
  Emmanuel Fritsch, Florian Massuyeau, Benjamin Rondeau, Olivier Segura and Thomas Hainschwang.
  Gems Gemol. 2011, 47, 123-123
• SPECTRAL DIFFERENTIATION OF NATURAL-COLOR SALTWATER CULTURED PEARLS FROM PINCTADA MARGARITIFERA AND PTERIA STERNA.
  Stefanos Karampelas, Emmanuel Fritsch, Thomas Hainschwang and Jean-Pierre Gauthier.
  Gems Gemol. 2011, 47, 117-117
• AMAZING PLAY-OF-COLOR OPALS FROM WOLLO, ETHIOPIA-TOWARD A GENETIC MODEL.
  Benjamin Rondeau, Emmanuel Fritsch, Francesco Mazzero, Dereje Ayalew and Yves Bodeur.
  Gems Gemol. 2011, 47, 112-112
• Vibrational States in Opals Revisited.
  V G. Ivanov, B. Aguilar Reyes, E. Fritsch and E. Faulques.
  J. Phys. Chem. C 2011, 115, 11968-11975
• Bistable N(2)-H complexes: The first proposed structure of a H-related colour-causing defect in diamond.
  J P. Goss, C P. Ewels, P R. Briddon and E. Fritsch.
  Diam. Relat. Mat. 2011, 20, 896-901
• INFRARED SPECTROSCOPY OF NATURAL VS. SYNTHETIC AMETHYST: AN UPDATE.
  Stefanos Karampelas, Emmanuel Fritsch, Triantafillia Zorba and Konstantinos M. Paraskevopoulos.
  Gems Gemol. 2011, 47, 196-201

• New opals from Wollo, Ethiopia: Geochemical characterization.
  B. Rondeau, E. Fritsch, B. Tok and F. Mazzero.
  Geochim. Cosmochim. Acta 2010, 74, A880-A880
• Luminescence of opals: A witness to their geochemistry.
  E. Fritsch, E. Gaillou, F. Massuyeau and B. Rondeau.
  Geochim. Cosmochim. Acta 2010, 74, A307-A307
• HIBONITE: A NEW GEM MINERAL.
  Thomas Hainschwang, Franck Notari, Laurent Massi, Thomas Armbruster, Benjamin Rondeau, Emmanuel Fritsch and Mariko Nagashima.
  Gems Gemol. 2010, 46, 135-138
• X-RAY COMPUTED MICROTOMOGRAPHY APPLIED TO PEARLS: METHODOLOGY, ADVANTAGES, AND LIMITATIONS.
  Stefanos Karampelas, Jurgen Michel, Mingling Zheng-Cui, Jens-Oliver Schwarz, Frieder Enzmann, Emmanuel Fritsch, Leon Leu and Michael S. Krzemnicki.
  Gems Gemol. 2010, 46, 122-127
• PLAY-OF-COLOR OPAL FROM WEGEL TENA, WOLLO PROVINCE, ETHIOPIA.
  Benjamin Rondeau, Emmanuel Fritsch, Francesco Mazzero, Jean-Pierre Gauthier, Benedicte Cenki-Tok, Eyassu Bekele and Eloise Gaillou.
  Gems Gemol. 2010, 46, 90-105

• Role of polyenes in the coloration of cultured freshwater pearls.
  Stefanos Karampelas, Emmanuel Fritsch, Jean-Yves Mevellec, Spyros Sklavounos and Triantafyllos Soldatos.
  Eur. J. Mineral. 2009, 21, 85-97
• IDENTIFICATION OF THE ENDANGERED PINK-TO-RED STYLASTER CORALS BY RAMAN SPECTROSCOPY.
  Stefanos Karampelas, Emmanuel Fritsch, Benjamin Rondeau, Aude Andouche and Bernard Metivier.
  Gems Gemol. 2009, 45, 48-52
• Gemology: The Developing Science of Gems.
  Emmanuel Fritsch and Benjamin Rondeau.
  Elements 2009, 5, 147-152
• MORE ON THE "FLUORESCENCE CAGE".
  Emmanuel Fritsch, Franck Notari, Candice Grobon-Caplan and Thomas Hainschwang.
  Gems Gemol. 2009, 45, 235-235

• A blue manganaxinite..
  Jean-Marie Arlabosse, Benjamin Rondeau and Emmanuel Fritsch.
  Gems Gemol. 2008, 44, 81-81
• HPHT treatment of CO2 containing and CO2-related brown diamonds.
  Thomas Hainschwang, Franck Notari, Emmanuel Fritsch, Laurent Massi, Benjamin Rondeau, Christopher M. Breeding and Heiner Vollstaedt.
  Diam. Relat. Mat. 2008, 17, 340-351
• Comment on: Determination of canthaxanthin in the red coral (Corallium rubrum) from Marseille by HPLC combined with UV and MS detection (Cvejic et al. Mar Biol 152 : 855-862, 2007).
  Emmanuel Fritsch and Stefanos Karampelas.
  Mar. Biol. 2008, 154, 929-930
• Characterization of emeralds from a historical deposit: Byrud (Eidsvoll), Norway.
  Benjamin Rondeau, Emmanuel Fritsch, Jean-Jacques Peucat, Fred Steinar Nordrum and Lee Groat.
  Gems Gemol. 2008, 44, 108-122
• A classification of gem corundum deposits aimed towards gem exploration.
  Cedric Simonet, Emmanuel Fritsch and Bernard Lasnier.
  Ore Geol. Rev. 2008, 34, 127-133
• The geochemistry of gem opals as evidence of their origin.
  Eloise Gaillou, Aurelien Delaunay, Benjamin Rondeau, Martine Bouhnik-le-Coz, Emmanuel Fritsch, Guy Cornen and Christophe Monnier.
  Ore Geol. Rev. 2008, 34, 113-126
• Common gem opal: An investigation of micro- to nano-structure.
  Eloise Gaillou, Emmanuel Fritsch, Bertha Aguilar-Reyes, Benjamin Rondeau, Jeffrey Post, Alain Barreau and Mikhail Ostroumov.
  Am. Miner. 2008, 93, 1865-1873
• Natural pearls of the Veneridae family.
  Stefanos Karampelas, Emmanuel Fritsch and Franck Notari.
  Gems Gemol. 2008, 44, 374-375
• Photoinduced H1b and H1c centers in some natural treated diamonds.
  E. Gaillou, E. Fritsch and F. Notari.
  Diam. Relat. Mat. 2008, 17, 2029-2036
• Comment on "Determination of carotenoid as the purple pigment in Gorgonia ventalina sclerites using Raman spectroscopy" [Leverette et al., Spectrochim. Acta A, 69 (2008) 1058-1061].
  Emmanuel Fritsch and Stefanos Karampelas.
  Spectroc. Acta Pt. A-Molec. Biomolec. Spectr. 2008, 71, 1627-1627

• Hydrogen-related optical centers in natural diamond: An update.
  Emmanuel Fritsch, Thomas Hainschwang, Laurent Massi and Benjamin Rondeau.
  New Diam. Front. Carbon Technol. 2007, 17, 63-89
• Determination by Raman scattering of the nature of pigments in cultured freshwater pearls from the mollusk Hyriopsis cumingi.
  S. Karampelas, E. Fritsch, J Y. Mevellec, J -P. Gauthier, S. Sklavounos and T. Soldatos.
  J. Raman Spectrosc. 2007, 38, 217-230
• Thermochromic and photochromic behaviour of "chameleon" diamonds.
  E. Fritsch, L. Massi, G R. Rossman, T. Hainschwang, S. Jobic and R. Dessapt.
  Diam. Relat. Mat. 2007, 16, 401-408
• H-1, Si-29 and Al-27 NMR study of the destabilization process of a paracrystalline opal from Mexico.
  Michael Paris, Emmanuel Fritsch and Bertha Aguilar O. Reyes.
  J. Non-Cryst. Solids 2007, 353, 1650-1656
• On the growth of natural octahedral diamond upon a fibrous core.
  Benjamin Rondeau, Emmanuel Fritsch, Moreton Moore, Emilie Thomassot and Jean-Francois Sirakian.
  J. Cryst. Growth 2007, 304, 287-293
• A contribution to the understanding of pink color in diamond: The unique, historical << Grand Conde >>.
  Emmanuel Fritsch, Benjamin Rondeau, Thomas Hainschwang and Marie-Helene Quellier.
  Diam. Relat. Mat. 2007, 16, 1471-1474
• Ga/Mg ratio as a new geochemical tool to differentiate magmatic from metamorphic blue sapphires.
  J J. Peucat, P. Ruffault, E. Fritsch, Bouhnik-Le A. Coz, C. Simonet and B. Lasnier.
  Lithos 2007, 98, 261-274
• Otolith pendant.
  Stefanos Karampelas, Blanca Mocquet and Emmanuel Fritsch.
  Gems Gemol. 2007, 43, 380-381

• Cleavage resistance of plastically deformed natural diamonds revealed by dissolved planar features.
  Emmanuel Fritsch, Benjamin Rondeau and Franck Notari.
  Diam. Relat. Mat. 2006, 15, 1310-1313
• Natural, untreated diamonds showing the A, B and C infrared absorptions ("ABC diamonds"), and the H2 absorption.
  Thomas Hainschwang, Franck Notari, Emmanuel Fritsch and Laurent Massi.
  Diam. Relat. Mat. 2006, 15, 1555-1564
• A Raman investigation of the amblygonite-montebrasite series.
  Benjamin Rondeau, Emmanuel Fritsch, Pierre LeFevre, Michel Guiraud, Andre-Mathieu Fransolet and Yves Lulzac.
  Can. Mineral. 2006, 44, 1109-1117
• The nanostructure of fire opal.
  E. Fritsch, E. Gaillou, B. Rondeau, A. Barreau, D. Albertini and M. Ostroumov.
  J. Non-Cryst. Solids 2006, 352, 3957-3960