IGR – Italian Gemological Review #23 – Autumn 2026

Cover IGR 22 eng


You can purchase IGR – Italian Gemological Review Issue #23 with the 2025/26 subscription!

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IN THIS ISSUE:

Paolo Minieri Editoriale IGR 20

  • Editorial – I Have a Dream: a Possible Gemmology (Paolo Minieri)

sergio sorrentino igr 19

  • The Diamond View – Are Natural Diamonds Heading Toward a New Market Phase? (Sergio Sorrentino)

russian hydrothermal emeralds igr 23

  • 10X – De Smaragdorum Hydrothermalium Natura, quae in Russia reperiuntur, sed a Natura non generantur. On the Nature of Russian Hydrothermal Emeralds (Unnatural) — in Seven Parts. Part Three – A “Mystery” Within The Mystery. Nutrients, “Dopants”/Coloring Agents, Autoclave Linings: What Do They Have to Do With Refractive Indices and Types of Inclusions? (Luigi Costantini, Alberto Malossi, Claudio Russo, with the collaboration of Flavio Butini and Marco Torelli)

  • GEM NEWS – Polar Deposit Nephrite: Metasomatism, Chromium, and Art in Canada’s Green Jade
  • GEM NEWS – Acquiring De Beers Will Bring the Diamond Mining Industry Model to a Turning Point
  • GEM NEWS – Parma, Italy, to Host Upcoming Workshop Dedicated to Photomicrography Techniques in Gemology
  • GEM NEWS – Oxygen Isotopes in Rubies and Sapphires: A New Key to Distinguish Natural and Synthetic Corundum
  • GEM NEWS – Swiss International Gemlab (SIG): A New Analytical Laboratory for Colored Gemstones
  • GEM NEWS – IGI Acquires AGL for $13.2 Million
  • GEM NEWS – TRACR and GIA: The Market Moves, and So Do Blockchains

  • ETHICAL STONES – The Giant Myanmar Ruby and the Race to €100 Million: Why Do Gemologists Remain Out of The Picture? (Paolo Minieri)

  • 8th Edition of the National Conference of Gemmology. The report from Pavia (Paolo Minieri, Stefania Coppola)

includes the inserts:

  • Vincent Pardieu at IGR: Ethiopian Paraíba and Indicolite, Rushing Ahead of the Data (IGR Team)
  • The Paraíba Dilemma: Between Scientific Rigor, Market Dynamics, and Diagnostic Challenges (Riccardo Luppi)

  • Inside Gemstones: Images that Guide Identification (Thomas Hainschwang, Billie E. Hughes, Giovanni Pace, Francesco Protopapas)

  • Two Short Stories About Topaz (Or Perhaps Not), and a Few Questions (Marco Calabrò)

  • COUNTER-GEMOLOGY – Two Lives Made Parallel by Gemology: The Tunnel-Digger and the Conference Lecturer (The “Bad-Mouthed Jiminy Cricket”: Luigi Costantini)

Cover IGR 22 eng

ON THE COVER:

The parcel of tourmalines reportedly from Abuloo area in Ethiopia. (Photo: Vincent Pardieu)


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AUTHORS AND COLLABORATORS:

The following people contributed to this issue: Domenico Angelino, Flavio Butini, Marco Calabrò, Stefania Coppola, Luigi Costantini, Aurélien Delaunay, Christian Dunaigre, Thomas Hainschwang, Billie E. Hughes, Stefanos Karampelas, Riccardo Luppi, Michele Macrì, Alberto Malossi, Paolo Minieri, Giovanni Pace, Vincent Pardieu, Francesco Protopapas, Claudio Russo, Alberto Scarani, Sergio Sorrentino, Marco Torelli


SPONSORS AND SUPPORTERS:

We would like to thank the companies that contributed to the development and printing of this issue as sponsors and supporters: Agemina Gioielli, Catawiki, Diamondsonline, Gem Tech, Gemmarum Lapidator, IGI International Gemological Institute Italy, Lineagem, MAGILABS, Malossi Gemmecreate, Martinez Diamanti, Minieri Gemme, WPS di Marco Longhi.

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