Article Library

New types of synthetic periclase identified by C2S inclusions - dicalcium silicate cement hardener

Date: 19/12/2018 · Authors: A. Peretti et al. · Published In: Contributions to Gemology Special Alert Issue 19 December 2018

Spinel formation by sulphur-rich saline brines from Mansin (Mogok area, Myanmar)

Date: 02/10/2018 · Authors: A. Peretti et al. · Published In: Abstract from 15th Swiss Geoscience Meeting 2017

Identifying new Kashmir-type sapphires from Madagascar

Date: 17/10/2017 · Authors: JNA Online · Published In: Jewellery News Asia - October 2017

Identification of sapphires from Madagascar with inclusion features resembling those of sapphires from Kashmir (India)

Date: 21/05/2017 · Authors: Adolf Peretti, Francesca Peretti · Published In: ICA InColor – Spring 2017

GRS unveils new book on Mogok ruby

Date: 25/06/2016 · Authors: Adolf Peretti · Published In: Jewellery News Asia – June 2016

Q&A – GRS forges solid path in gem treatment detection

Date: 08/01/2016 · Authors: Adolf Peretti · Published In: Jewellery News Asia – January 2016

Interview with Dr. Adolf Peretti: Emerald and rock sampling strategy

Date: 05/01/2016

Mozambique – rubies gaining favour in the gemstone world

Date: 02/11/2015 · Authors: Adolf Peretti · Published In: Jewellery News Asia – November 2015

Perettiit – Ein Mineral erhält den Namen seins Entdeckers Dr. Adolf Peretti

Date: 02/11/2015 · Authors: Bryan Pavlik · Published In: Gemmo News Ausgabe 42

GRS Alert: A new type of synthetic spinel appears at the Bangkok show

Date: 14/09/2015

NDT breaking the 10-carat barrier

Date: 10/09/2015 · Authors: Adolf Peretti, Branko Deljanin, Matthias Alessandri, Mikko Åström, Andrey Katrusha · Published In: Jewellery News Asia – September 2015

New generation of pulled synthetic spinel from Russia imitating natural ‘Lavender’-colored and natural ‘Cobalt’ spinel from Vietnam

Date: 10/09/2015 · Authors: Adolf Peretti, Willy Bieri, Matthias Alessandri, Andre Huber, Mario Meier · Published In: Contributions to Gemology 11

Die Bündner Berge waren der Schlüssel

Date: 04/09/2015 · Authors: Michelle Russi · Published In: Bündner Tagblatt

Luzerner Firma identifiziert neues Mineral

Date: 19/08/2015 · Authors: PD · Published In: Neue Luzerner Zeitung

NDT breaking the 10 carat barrier: World record faceted and gem-quality synthetic diamonds investigated

Date: 22/07/2015 · Authors: Adolf Peretti, Branko Deljanin, Matthias Alessandri, Mikko Åström · Published In: Contributions to Gemology 15

Heat-treatment of spinel

Date: 01/05/2015 · Authors: Adolf Peretti, Ngwe Lin Tun, Thomas Armbruster · Published In: Contributions to Gemmology No. 11

New type of treatment of spinel discovered involving heat treatment and cobalt-diffusion

Date: 01/05/2015 · Authors: Adolf Peretti, Detlef Günther, MTM Haris · Published In: Contributions to Gemmology No. 11

The world of pink diamonds

Date: 01/04/2015 · Authors: Branko Deljanin, Adolf Peretti, Matthias Alessandri · Published In: ICA InColor Spring 2015

Distinguishing traits of Mozambique ruby

Date: 01/07/2014 · Authors: Adolf Peretti · Published In: Jewellery News Asia – July 2014

New generation of synthetic diamonds reaches the market (part B): Identification of treated CVD-grown pink diamonds from Orion (PDC)

Date: 01/03/2014 · Authors: Adolf Peretti, Branko Deljanin, Franz Herzog, Willi Bieri, Matthias Alessandri, Detlef Günther, Daniel A. Frick, Eduard Cleaveland, Alexandre M. Zaitsev · Published In: Contributions to Gemmology No. 14

New generation of synthetic diamonds reaches the market (part C): Origin of yellow color in CVD-grown diamonds and treatment experiments

Date: 01/03/2014 · Authors: Adolf Peretti, Branko Deljanin, Alexandre M. Zaitsev, Matthias Alessandri, Willy Bieri · Published In: Contributions to Gemmology No. 14

Q&A – GRS takes a deeper look at coloured gems

Date: 01/01/2014 · Authors: Adolf Peretti · Published In: Jewellery News Asia – January 2014

Spinel’s alluring features

Date: 01/01/2014 · Authors: Adolf Peretti · Published In: Jewellery News Asia – January 2014

New generation of synthetic diamonds reaches the market (part A): CVD-grown blue diamonds

Date: 01/11/2013 · Authors: Adolf Peretti, Franz Herzog, Willy Bieri, Matthias Alessandri, Detlef Günther, Daniel Frick, Eduard Cleaveland, Alexandre M. Zaitsev, Branko Deljanin · Published In: Contributions to Gemmology No. 14

GRS expedition to the Mogok ruby, sapphire and spinel mines

Date: 01/10/2013 · Authors: Adolf Peretti · Published In: Jewellery News Asia – October 2013

Teaser – Mogok mines, spinel come into focus at Sept HK fair

Date: 01/09/2013 · Authors: Adolf Peretti · Published In: Jewellery News Asia – September 2013

Record-breaking rubies discovered in Didy, Madagascar

Date: 01/05/2013 · Authors: Adolf Peretti, Lawrence Hahn · Published In: Contributions to Gemmology No. 13

The story of pearls – An elemental perspective

Date: 01/03/2013 · Authors: Adolf Peretti, Steffen Allner, Francesca Peretti, Kathrin Hametner, Mattias Fricker, Detlef Günther · Published In: Chimia International Journal for Chemistry

Fluid inclusions confirm authenticity of Tibetan andesine

Date: 01/06/2011 · Authors: Adolf Peretti, Willy Bieri, Kathrin Hametner, Detlef Günther, Richard W. Hughes · Published In: ICA InColor – Summer 2011

Distinguishing natural Tibetan copper-bearing andesine from its diffusion-treated counterparts using advanced analytical methods

Date: 01/05/2011 · Authors: Adolf Peretti, Igor Villa, Willy Bieri, Kathrin Hametner, Ladina Dorta, Gisela Fontaine, Mario Meier, Detlef Günther · Published In: Contributions to Gemmology No. 10

Authenticity and provenance studies of copper-bearing andesines using Cu isotope ratios and element analysis by fs-LA-MC-ICPMS and ns-LA-ICPMS

Date: 01/10/2010 · Authors: Adolf Peretti, Gisela H. Fontaine, Kathrin Hametner, Detlef Günther · Published In: Analytical and Bioanalytical Chemistry

Characterization of gemstones by multiple excitation EDXRF

Date: 01/01/2010 · Authors: Adolf Peretti, M. Haller, V, Rößiger, D. Günther · Published In: Helmut Fischer GmbH Publication

Chemical composition of apatite inclusions in corundum and spinel determined by LA-ICP-MS and its potential for authentication and provenance determination

Date: 01/01/2010 · Authors: Willy Bieri, Adolf Peretti, Bernard Grobety, Kathrin Hametner, Detlef Günther · Published In: GRS Online Publication

Chemical variations in multicolored “Paraiba”-type tourmalines from Brazil and Mozambique: Impact on origin and authenticity determination

Date: 01/09/2009 · Authors: Adolf Peretti, Willy Bieri, Eric Reusser, Detlef Günther, Kathrin Hametner · Published In: Contributions to Gemmology No. 9

Johachidolite, CaAl[B3O7], a mineralogical and structural peculiarity

Date: 01/09/2009 · Authors: Adolf Peretti, Milen Kadyiski, Thomas Armbruster, Detlef Günther, Eric Reusser · Published In: European Journal of Mineralogy

Winza rubies identified

Date: 01/12/2008 · Authors: Adolf Peretti, Francesca Peretti, Anong Kanpraphai, Willy Bieri, Kathrin Hametner, Detlef Günther · Published In: Contributions to Gemmology No. 7

Mushroom tourmaline and associated minerals from pegmatites near Momeik, Mogok stone tract, Myanmar (Burma)

Date: 01/01/2008 · Authors: Adolf Peretti, Alexander U. Falster, William B. Simmons · Published In: Rocks & Minerals

Gem-quality Johachidolite

Date: 01/09/2007 · Authors: Adolf Peretti, Detlef Günther, Eric Reusser, Thomas Armbruster, Francesca Peretti, Willy Bieri, Ngwe Lin Tun, Kathrin Hametner, Milen Kadyiski · Published In: Contributions to Gemmology No. 5

Pezzottaite, Cs(Be2Li)Al2Si6O18: A spectacular new mineral related to the beryl group, from Madagascar

Date: 01/01/2004 · Authors: Adolf Peretti, Frank C. Hawthorne, Mark A. Cooper, William B. Simmons, Alexander Falster, Brendan M. Laurs, Thomas Armbruster, George R. Rossman, Detlef Günther, Bernard Grobety · Published In: Mineralogical Record

The challenge of the identification of a new mineral species: example “Pezzottaite”

Date: 01/01/2004 · Authors: Adolf Peretti, Bernard Grobety, Frank C Hawthorne, Alexander U Falster, Brendan M. Laurs, , Joseph Mullis, Detlef Günther · Published In: Contributions to Gemmology No. 3

The crystal structure of painite CaZrB[Al9O18] revisited

Date: 01/01/2004 · Authors: Adolf Peretti, Thomas Armbruster, Nicola Döbelin, Detlef Günther, Eric Reusser, Bernhard Grobety · Published In: American Mineralogist

Pezzottaite from Ambatovita, Madagascar: A new gem mineral

Date: 01/11/2003 · Authors: Adolf Peretti, Brendan M. Laurs, William B. (Skip) Simmons, George R. Rossman, Elizabeth P. Quinn, Shane F. McClure, Thomas Armbruster, Frank C. Hawthorne, Alexander U. Falster, Detlef Günther, Mark A. Cooper, and Bernard Grobéty · Published In: Gems & Gemology

Namya rubies

Date: 08/08/2003 · Authors: Adolf Peretti · Published In: Contributions to Gemmology No. 2

Beryllium treatment of fancy sapphires with a new heat-treatment technique (Part B)

Date: 01/08/2003 · Authors: Adolf Peretti, Detlef Günther, Anne-Liese Graber · Published In: Contributions to Gemmology No. 2

Expedition to the Namya mines in Northern Burma

Date: 01/08/2003 · Authors: Adolf Peretti, Anong Kanpraphai · Published In: Contributions to Gemmology No. 2

Light element test for identification of spinel by LA-ICP-MS

Date: 01/07/2003 · Authors: Adolf Peretti, Detlef Günther · Published In: Contributions to Gemmology

New findings of painite

Date: 01/03/2003 · Authors: Adolf Peretti · Published In: Contributions to Gemmology No. 2

Fluid inclusion investigations of fissure minerals from NEAT transects (Gotthard and Lötschberg base tunnels) trough the Central Alps: Preliminary results

Date: 01/04/2001 · Authors: Adolf Peretti, Joseph Mullis, Michael Overstolz, Meinert Rahn, Peter Amacher · Published In: Conference Abstract

Characterization of a group of experimental Russian hydrothermal synthetic sapphires

Date: 01/01/2000 · Authors: Adolf Peretti, Karl Schmetzer · Published In: Journal Of Gemmology

Vorkommen und chemische Variabilität der Mikromineralien im Bereich des Kraftwerkbaus von Amsteg

Date: 01/09/1998 · Authors: Adolf Peretti, Peter Amacher, Joseph Mullis · Published In: Swiss Society of Mineralogy and Petrology

Die Saphire von Andranondambo

Date: 01/04/1998 · Authors: Adolf Peretti, Eduard J. Gübelin · Published In: NZZ Neue Zürcher Zeitung

Distinction of natural and synthetic rubies by fluid inclusion analysis

Date: 01/07/1997 · Authors: Adolf Peretti, Joseph Mullis · Published In: Conference Abstract

Im Flussmittelverfahren gezüchteter synthetischer Alexandrit aus Russland – Teil 1

Date: 01/04/1997 · Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, O. Medenbach · Published In: GZ Goldschmiede Zeitung

Im Flussmittelverfahren gezüchteter synthetischer Alexandrit aus Russland – Teil 2

Date: 01/04/1997 · Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, O. Medenbach · Published In: GZ Goldschmiede Zeitung

Corundum – where and why?

Date: 01/03/1997 · Authors: Adolf Peretti · Published In: Momentum (Mouawad)

Christie’s and Phillips Kashmir sapphire auction report

Date: 01/01/1997 · Authors: Adolf Peretti · Published In: Momentum (Mouawad)

Inclusions in synthetic rubies and synthetic sapphires produced by hydrothermal methods (TAIRUS, Novosibirsk, Russia)

Date: 01/01/1997 · Authors: Adolf Peretti, Joseph Mullis, Fred Mouawad, Richard Guggenheim · Published In: Journal Of Gemmology

Sapphires from Adranondambo mine in SE Madagascar: Evidence for metasomatic skarn formation

Date: 01/01/1997 · Authors: Adolf Peretti, Eduard J. Gübelin · Published In: Journal Of Gemmology

Rubíes de Mong Hsu

Date: 01/07/1996 · Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, Fred Mouawad · Published In: Boletin Del Instituto Gemologico Espanol

New inclusions in Pakistani peridot: Vonsenite-Ludwigite needles

Date: 01/01/1996 · Authors: Adolf Peretti, Eduard J. Gübelin · Published In: JewelSiam

Russian flux-grown synthetic alexandrite

Date: 01/01/1996 · Authors: Adolf Peretti, Karl Schmetzer, O. Medenbach, H.-J. Bernhardt · Published In: Gems & Gemology

The role of fluorine in the formation of color zoning in rubies from Mong Hsu

Date: 01/01/1996 · Authors: Adolf Peretti, Joseph Mullis, Fred Mouawad · Published In: Journal Of Gemmology

Sapphires from Southern Vietnam

Date: 01/08/1995 · Authors: Adolf Peretti, Christopher P. Smith, Robert C. Kammerling, Alice S. Keller, Kenneth V. Scarratt, Nguyen Dang Khao, Saverio Repetto · Published In: Gems & Gemology

Rubies from Mong Hsu

Date: 01/01/1995 · Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, Fred Mouawad · Published In: Gems & Gemology

Rubin aus Mong Hsu, Myanmar (Burma) ein neues Vorkommen von kommerzieller Bedeutung Teil 1

Date: 01/01/1995 · Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, Fred Mouawad · Published In: Trade Journal

Rubin aus Mong Hsu, Myanmar (Burma) ein neues Vorkommen von kommerzieller Bedeutung Teil 2

Date: 01/01/1995 · Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, Fred Mouawad · Published In: Trade Journal

Fluorite inclusions in Mong Hsu ruby

Date: 01/01/1994 · Authors: Adolf Peretti, F. Mouawad · Published In: JewelSiam

An in-depth look at Russia’s hydrothermal synthetic rubies

Date: 01/05/1993 · Authors: Adolf Peretti, Christopher P. Smith · Published In: JewelSiam

Highly reducing conditions during Alpine metamorphism of the Malenco peridotite (Sondrio, northern Italy) indicated by mineral paragenesis and H2 in fluid inclusions

Date: 01/02/1993 · Authors: Adolf Peretti, Jean Dubessy, Joseph Mullis · Published In: Contributions to Mineralogy and Petrology

Foreign substances in Mong Hsu rubies

Date: 01/01/1993 · Authors: Adolf Peretti · Published In: JewelSiam

Rubies du Vietnam: Etude comparative avec les rubies de Birmanie e d’ autres provenence

Date: 01/01/1993 · Authors: Adolf Peretti, M.-L. Dele -Dubois, J. Fournier · Published In: Revue De Gemmologie

Color measurement of fancy diamonds applying computer-based multichannel spectroscopy

Date: 01/01/1991 · Authors: Adolf Peretti, Walter Boguth · Published In: Conference Paper – International Gemological Symposium

Die Kaschmir-Saphire und ihr geologisches Erinnerungsvermögen

Date: 08/01/1990 · Authors: Adolf Peretti, J. Mullis, R. Kündig · Published In: NZZ Neue Zürcher Zeitung

The magnetic properties of metaperidotitic rocks as a function of metamorphic grade: Implications for crustal magnetic anomalies

Date: 01/01/1988 · Authors: Adolf Peretti, Peter N. Shive, Ronald Frost · Published In: Journal Of Geophysical Research – Wyoming, USA

Geochemical and lead isotope evidence for a mid-ocean ridge type mineralization within a polymetamorphic ophiolite complex

Date: 01/01/1986 · Authors: Adolf Peretti, V. Köppel · Published In: Earth and Planetary Science Letters

Der Monte-del-Forno-Komplex am Bergell-Ostrand: Seine Lithostratigraphie, alpine Tektonik und Metamorphose

Date: 01/01/1985 · Authors: Adolf Peretti · Published In: Eclogae Geologicae Helvetiae

Klufmineralien im südlichen Gotthardmassiv: 15.8 +/- 0.3 Mio. Jahre alt

Date: 01/01/1982 · Authors: Adolf Peretti, P. Amacher · Published In: Mineralienfreund

Rb-Sr-Alter von Kluftmineralien im südlichen Gotthardmassiv

Date: 01/01/1981 · Authors: Adolf Peretti, Bucher I, Steiger R.H. · Published In: Journal Swiss Society of Mineralogy and Petrology

Kluftmineralien aus unter- und mittelpenninischen Bündnerschiefern Mittelbündens

Date: 01/01/1979 · Authors: Adolf Peretti · Published In: Journal Schweizer Jugend Forscht