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08/01/2016

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

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

Emerald, PDF, Perettiite, Rare Minerals, Ruby, Sapphire, Spinel, Synthetics, Various
10/09/2015

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: Contributions to Gemology 11 Download Publication

PDF, Spinel, Synthetics
10/09/2015

NDT breaking the 10-carat barrier

Authors: Adolf Peretti, Branko Deljanin, Matthias Alessandri, Mikko Åström, Andrey Katrusha Published in: Jewellery News Asia – September 2015 Download Publication

Diamond, PDF, Synthetics
22/07/2015

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: Contributions to Gemology 15 Download Publication

Diamond, Synthetics
01/03/2014

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 Published in: Contributions to Gemmology No. 14 Download Publication

Diamond, Synthetics
01/03/2014

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 Günther, Daniel A. Frick, Eduard Cleaveland, Alexandre M. Zaitsev Published in: Contributions to Gemmology No. 14 Download Publication

Diamond, Synthetics
01/11/2013

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, Eduard Cleaveland, Alexandre M. Zaitsev, Branko Deljanin Published in: Contributions to Gemmology No. 14 Download Publication

Diamond, Synthetics
01/01/2000

Characterization of a group of experimental Russian hydrothermal synthetic sapphires

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

Sapphire, Synthetics
01/07/1997

Distinction of natural and synthetic rubies by fluid inclusion analysis

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

Ruby, Synthetics
01/04/1997

Im Flussmittelverfahren gezüchteter synthetischer Alexandrit aus Russland – Teil 1

Authors: Adolf Peretti, Karl Schmetzer, Heinz-Jürgen Bernhardt, O. Medenbach Published in: GZ Goldschmiede Zeitung Download Publication

Ruby, Synthetics
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Latest GRS Alerts
New types of synthetic periclase identified by C2S inclusions – dicalcium silicate cement hardener 19/12/2018
Warning: Synthetic Padparadscha sold as Natural in the trade. 11/09/2018
GRS Alert: Unusual phosphorescent pebbles identified as synthetic aggregates 24/04/2016
Recent Posts
Video: Mozambique Ruby Collection – A Lifetime Experience 05/05/2020
Color stability test: Overview of “type” classifications 23/12/2019
Introducing GRS brilliancy-type “vibrant” 14/11/2019
GRS Newsletter

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