Latest GRS News

06/11/2015

An ethical debate concerning ‘pigeon’s blood’ rubies and ‘royal blue’ sapphires from diverse origins

by Dr. A. Peretti, Director GRS   Lucerne, 6 November 2015 – The descriptive terminology of Pigeon’s Blood and Royal Blue colors first appeared on gemstone reports issued by GRS in the late 90’s (see timeline below). Since then, thousands of such reports have been issued with wide acceptance by the international trade. The specific grading criteria […]

News
23/10/2015

Update of GRS type “Muzo green” emerald report policy

Lucerne, Switzerland [updated 6 November 2017] – The 1st International Emerald Symposium held in Bogotá, Colombia, October 13-15, 2015 brought together leading members of the gem and jewelry trade from around the world. There, GRS presented its proprietary color-grading concept for emeralds called GRS type “Muzo green” which identifies stones with exceptional color saturation and hue. […]

News
14/09/2015

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, Bangkok) had commissioned to a laboratory in Russia the production of new types of synthetic spinel of “lavender” colors by the method of crystal pulling from flux. This technique is the same used at the Institute of […]

Alerts, News, Spinel
19/08/2015

Perettiite Introduced At 8th European Conference on Mineralogy and Spectroscopy in Rome, Italy

8th European Conference on Mineralogy and Spectroscopy September 9-11, 2015 Rome, Italy September 8, 2015 – Museo Di Minerologica, Sapienza Universita Di Roma 16.00-18.00 – Participant registration 17.00-19.00 – Icebreaker party, visit to Mineralogy Museum Many different talks including next day September 9, 2015 – Aula Convegni, CNR 12.15-12.30 – Perettiite-(Y), Y3+2Mn2+4Fe2+[Si2B8O24], a new mineral […]

News
04/08/2015

Perettiite – A New Mineral Discovery From Burma & 20 Years of GRS Gemresearch Swisslab AG in Switzerland

GRS announces the discovery of a new mineral; Perettiite-(Y) found in Burma (Myanmar) by Dr. Adolf Peretti which has also been named for him. Dr. Adolf Peretti mineral’s discoverer is head gemologist and director of GRS Gemresearch Swisslab AG (Adligenswil, Switzerland). “Perettiite” was identified after months of intense lab sessions with the support of a […]

News
21/07/2015

NDT Breaking The 10 Carat Barrier – World Record Synthetic Diamonds Investigated

Introduction The first small manufactured industrial diamonds were produced in 1953 by the Swedish company ASEA but their accomplishment went unannounced. In 1970, General Electric (GE) produced synthetic diamond crystals using the HPHT method with a belt type of press and created a 0.78ct polished RBC colorless diamond. In the 1980’s and 1990’s Russians used […]

Discoveries, News
08/06/2015

Record Sale of Magnificent Pigeon’s Blood Ruby and Diamond Necklace

A magnificent Burmese Pigeon’s Blood ruby necklace was sold for a total price (including buyers premium) of more than US$ 13 million at the Christie’s Magnificent Jewels auction on 2 June 2015 in Hong Kong. The achieved price makes it the most expensive ruby necklace ever sold at an auction. The outstanding necklace comprises of […]

News
22/05/2015

GRS Alert: New spinel treatment discovered involving heat- and cobalt-diffusion

Introduction Cobalt-spinels are considered one of the most precious spinel and are rarely colored blue with or without grey to black tones. Blue Cobalt spinel are at least 10-100x more expensive per carat than grayish-blue colored spinel. Cobalt intensifies the blue color in spinel, considerably enhancing its beauty. Cobalt-spinel over 5ct can be 10,000 to […]

Alerts, News
30/04/2015

The making of an international color standard by GRS: ‘Pigeon’s Blood’ & ‘Royal Blue’

Definitions, Retrospective and Future By Dr. A. Peretti, Director GRS Laboratories DEFINITIONS While pigeon’s blood color description was used in the past in the literature for rubies, GRS first made a master set for rubies that defined what pigeon’s blood is in comparison to the intensity of red, namely vivid red was chosen as the […]

News
22/12/2014

GRS Alert: Warming of Mozambique rubies previously certified as unheated by GRS

We would like to inform our customers that rubies found to be unheated when tested by GRS are sometimes heated after certification and presented as natural unheated rubies to the market without re-certifying with GRS. This very low temperature warming does not require repolishing of the stone and therefore no weight loss and no dimension […]

Alerts, News