GRS Article Library | GRS GemResearch Swisslab AG

14 Oct 17

Identifying new Kashmir-type sapphires from Madagascar

Authors: JNA Published in: Jewellery News Asia – October 2017 Download Publication...

21 May 17

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

Authors: Adolf Peretti, Francesca Peretti Published in: ICA InColor – Spring 2017 Download Pub...

25 Jun 16

GRS unveils new book on Mogok ruby

Authors: Adolf Peretti Published in: Jewellery News Asia – June 2016 Download Publication...

08 Jan 16

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

Authors: Adolf Peretti Published in: Jewellery News Asia – January 2016 Download Publication...

05 Jan 16

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

Interview with Dr. Adolf Peretti, CEO GRS Laboratories (subtitles availabe – click CC / max. r...

02 Nov 15

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

Authors: Bryan Pavlik Published in: Gemmo News Ausgabe 42 Download Publication...

01 Nov 15

Mozambique – rubies gaining favour in the gemstone world

Authors: Adolf Peretti Published in: Jewellery News Asia – November 2015 Download Publication...

14 Sep 15

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

Introduction In May 2015, the author (AP) was made aware that a company in Thailand (Tairus Co. LTD,...

10 Sep 15

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

Authors: Adolf Peretti, Willy Bieri, Matthias Alessandri, Andre Huber, Mario Meier Published in: Con...

10 Sep 15

NDT breaking the 10-carat barrier

Authors: Adolf Peretti, Branko Deljanin, Matthias Alessandri, Mikko Åström, Andrey Katrusha Publishe...

04 Sep 15

Die Bündner Berge waren der Schlüssel

Authors: Michelle Russi Published in: Bündner Tagblatt Download Publication...

19 Aug 15

Luzerner Firma identifiziert neues Mineral

Authors: PD Published in: Neue Luzerner Zeitung Download Publication...

22 Jul 15

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

Authors: Adolf Peretti, Branko Deljanin, Matthias Alessandri, Mikko Åström Published in: Contributio...

01 May 15

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

Authors: Adolf Peretti, Detlef Günther, MTM Haris Published in: Contributions to Gemmology No. 11 Do...

01 May 15

Heat-treatment of spinel

Authors: Adolf Peretti, Ngwe Lin Tun, Thomas Armbruster Published in: Contributions to Gemmology No....

01 Apr 15

The world of pink diamonds

Authors: Branko Deljanin, Adolf Peretti, Matthias Alessandri Published in: ICA InColor Spring 2015 D...

01 Jul 14

Distinguishing traits of Mozambique ruby

Authors: Adolf Peretti Published in: Jewellery News Asia – July 2014 Download Publication...

01 Mar 14

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

Authors: Adolf Peretti, Branko Deljanin, Alexandre M. Zaitsev, Matthias Alessandri, Willy Bieri Publ...

01 Mar 14

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

Authors: Adolf Peretti, Branko Deljanin, Franz Herzog, Willi Bieri, Matthias Alessandri, Detlef Günt...

01 Jan 14

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

Authors: Adolf Peretti Published in: Jewellery News Asia – January 2014 Download Publication...

01 Jan 14

Spinel’s alluring features

Authors: Adolf Peretti Published in: Jewellery News Asia – January 2014 Download Publication...

01 Nov 13

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

Authors: Adolf Peretti, Franz Herzog, Willy Bieri, Matthias Alessandri, Detlef Günther, Daniel Frick...

01 Oct 13

GRS expedition to the Mogok ruby, sapphire and spinel mines

Authors: Adolf Peretti Published in: Jewellery News Asia – October 2013 Download Publication...

01 Sep 13

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

Authors: Adolf Peretti Published in: Jewellery News Asia – September 2013 Download Publication...

01 May 13

Record-breaking rubies discovered in Didy, Madagascar

Authors: Adolf Peretti, Lawrence Hahn Published in: Contributions to Gemmology No. 13 Download Publi...

01 Mar 13

The story of pearls – An elemental perspective

Authors: Adolf Peretti, Steffen Allner, Francesca Peretti, Kathrin Hametner, Mattias Fricker, Detlef...

01 Jun 11

Fluid inclusions confirm authenticity of Tibetan andesine

Authors: Adolf Peretti, Willy Bieri, Kathrin Hametner, Detlef Günther, Richard W. Hughes Published i...

01 May 11

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

Authors: Adolf Peretti, Igor Villa, Willy Bieri, Kathrin Hametner, Ladina Dorta, Gisela Fontaine, Ma...

01 Oct 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

Authors: Adolf Peretti, Gisela H. Fontaine, Kathrin Hametner, Detlef Günther Published in: Analytica...

01 Jan 10

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

Authors: Willy Bieri, Adolf Peretti, Bernard Grobety, Kathrin Hametner, Detlef Günther Published in:...

01 Jan 10

Characterization of gemstones by multiple excitation EDXRF

Authors: Adolf Peretti, M. Haller, V, Rößiger, D. Günther Published in: Helmut Fischer GmbH Public...

01 Sep 09

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

Authors: Adolf Peretti, Willy Bieri, Eric Reusser, Detlef Günther, Kathrin Hametner Published in: Co...

01 Sep 09

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

Authors: Adolf Peretti, Milen Kadyiski, Thomas Armbruster, Detlef Günther, Eric Reusser Published in...

01 Dec 08

Winza rubies identified

Authors: Adolf Peretti, Francesca Peretti, Anong Kanpraphai, Willy Bieri, Kathrin Hametner, Detlef G...

01 Jan 08

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

Authors: Adolf Peretti, Alexander U. Falster, William B. Simmons Published in: Rocks & Minerals...

01 Sep 07

Gem-quality Johachidolite

Authors: Adolf Peretti, Detlef Günther, Eric Reusser, Thomas Armbruster, Francesca Peretti, Willy Bi...

01 Jan 04

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

Authors: Adolf Peretti, Bernard Grobety, Frank C Hawthorne, Alexander U Falster, Brendan M. Laurs, ,...

01 Jan 04

The crystal structure of painite CaZrB[Al9O18] revisited

Authors: Adolf Peretti, Thomas Armbruster, Nicola Döbelin, Detlef Günther, Eric Reusser, Bernhard Gr...

01 Jan 04

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

Authors: Adolf Peretti, Frank C. Hawthorne, Mark A. Cooper, William B. Simmons, Alexander Falster, B...

01 Nov 03

Pezzottaite from Ambatovita, Madagascar: A new gem mineral

Authors: Adolf Peretti, Brendan M. Laurs, William B. (Skip) Simmons, George R. Rossman, Elizabeth P....

08 Aug 03

Namya rubies

Authors: Adolf Peretti Published in: Contributions to Gemmology No. 2 Download Publication...

01 Aug 03

Expedition to the Namya mines in Northern Burma

Authors: Adolf Peretti, Anong Kanpraphai Published in: Contributions to Gemmology No. 2 Download Pub...

01 Aug 03

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

Authors: Adolf Peretti, Detlef Günther, Anne-Liese Graber Published in: Contributions to Gemmology N...

01 Jul 03

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

Authors: Adolf Peretti, Detlef Günther Published in: Contributions to Gemmology Download Publication...

01 Mar 03

New findings of painite

Authors: Adolf Peretti Published in: Contributions to Gemmology No. 2 Download Publication...

01 Apr 01

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

Authors: Adolf Peretti, Joseph Mullis, Michael Overstolz, Meinert Rahn, Peter Amacher Published in:...

01 Jan 00

Characterization of a group of experimental Russian hydrothermal synthetic sapphires

Authors: Adolf Peretti, Karl Schmetzer Published in: Journal Of Gemmology Download Publication...

01 Sep 98

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

Authors: Adolf Peretti, Peter Amacher, Joseph Mullis, Published in: Swiss Society of Mineralogy and...

01 Apr 98

Die Saphire von Andranondambo

Authors: Adolf Peretti, Eduard J. Gübelin Published in: NZZ Neue Zürcher Zeitung Download Publicatio...

01 Jul 97

Distinction of natural and synthetic rubies by fluid inclusion analysis

Authors: Adolf Peretti, Joseph Mullis Published in: Conference Abstract Download Publication...

01 Apr 97

Im Flussmittelverfahren gezüchteter synthetischer Alexandrit aus Russland – Teil 1

Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, O. Medenbach Published in: GZ Goldsc...

01 Apr 97

Im Flussmittelverfahren gezüchteter synthetischer Alexandrit aus Russland – Teil 2

Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, O. Medenbach Published in: GZ Goldsc...

01 Mar 97

Corundum – where and why?

Authors: Adolf Peretti Published in: Momentum (Mouawad) Download Publication...

01 Jan 97

Christie’s and Phillips Kashmir sapphire auction report

Authors: Adolf Peretti Published in: Momentum (Mouawad) Download Publication...

01 Jan 97

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

Authors: Adolf Peretti, Eduard J. Gübelin Published in: Journal Of Gemmology Download Publication...

01 Jan 97

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

Authors: Adolf Peretti, Joseph Mullis, Fred Mouawad, Richard Guggenheim Published in: Journal Of Gem...

01 Jul 96

Rubíes de Mong Hsu

Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, Fred Mouawad Published in: Boletin D...

01 Jan 96

Russian flux-grown synthetic alexandrite

Authors: Adolf Peretti, Karl Schmetzer, O. Medenbach, H.-J. Bernhardt Published in: Gems & Gemol...

01 Jan 96

New inclusions in Pakistani peridot: Vonsenite-Ludwigite needles

Authors: Adolf Peretti, Eduard J. Gübelin Published in: JewelSiam Download Publication...

01 Jan 96

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

Authors: Adolf Peretti, Joseph Mullis, Fred Mouawad Published in: Journal Of Gemmology Download Publ...

01 Aug 95

Sapphires from Southern Vietnam

Authors: Adolf Peretti, Christopher P. Smith, Robert C. Kammerling, Alice S. Keller, Kenneth V. Scar...

01 Jan 95

Rubies from Mong Hsu

Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, Fred Mouawad Published in: Gems...

01 Jan 95

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

Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, Fred Mouawad Published in: Trade Jou...

01 Jan 95

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

Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, Fred Mouawad Published in: Trade Jou...

01 Jan 94

Fluorite inclusions in Mong Hsu ruby

Authors: Adolf Peretti, F. Mouawad Published in: JewelSiam Download Publication...

01 May 93

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

Authors: Adolf Peretti, Christopher P. Smith Published in: JewelSiam Download Publication...

01 Feb 93

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

Authors: Adolf Peretti, Jean Dubessy, Joseph Mullis Published in: Contributions to Mineralogy and Pe...

01 Jan 93

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

Authors: Adolf Peretti, M.-L. Dele -Dubois, J. Fournier Published in: Revue De Gemmologie Download P...

01 Jan 93

Foreign substances in Mong Hsu rubies

Authors: Adolf Peretti Published in: JewelSiam Download Publication...

01 Jan 91

Color measurement of fancy diamonds applying computer-based multichannel spectroscopy

Authors: Adolf Peretti, Walter Boguth Published in: Conference Paper – International Gemologic...

08 Jan 90

Die Kaschmir-Saphire und ihr geologisches Erinnerungsvermögen

Authors: Adolf Peretti, J. Mullis, R. Kündig Published in: NZZ Neue Zürcher Zeitung Download Publica...

01 Jan 88

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

Authors: Adolf Peretti, Peter N. Shive, Ronald Frost Published in: ournal Of Geophysical Research...

01 Jan 86

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

Authors: Adolf Peretti, V. Köppel Published in: Earth and Planetary Science Letters Download Publica...

01 Jan 85