Latest GRS News


GRS Grand Opening Bangkok

On the 29th June 2014 we celebrated the opening of our new laboratory facilities in Bangkok. Thank you very much everyone for coming and celebrating this milestone with us. Here some impressions from the event:


GRS ‘Pigeon’s Blood’ report types for rubies

Burmese Pigeon’s Blood report sample:     Mozambican Pigeon’s Blood report samples: Type A: Ruby from Mozambique with considerable fluorescence is described as previously indicated by the descriptor GRS-type Pigeon’s Blood, owing to a similarity in color with its Burmese counterpart. Type B: Rubies typically appear as vivd red, reminiscent in color saturation of Pigeon […]


GRS Alert: Next-generation of synthetic diamonds reach market

CVD-grown Blue Diamonds – Identified by GRS and CGL-GRS laboratories Hong Kong, Lucerne and Vancouver – A distinctly new type of synthetic blue diamond sized from 0.25 carats to over 1.25 carats turned up at both the Bangkok and Hong Kong Gems & Jewellery Fairs in September 2013 along with pink, yellow, and colourless varieties of […]

Alerts, News

A review of beauty and rarity of Mozambique ruby

by Dr. A. Peretti From today’s perspective, it would be impossible to overstate the significance of African rubies in the gemstone trade. East African ruby, specifically from Mozambique, Tanzania and Madagascar, has recently dominated the market for several reasons; lack of thermal enhancement, brilliancy, size and for its color. No other geographical region has successfully […]


GRS Lab Seminar during September Hong Kong Jewellery & Gem Fair, 16th September 2013

The Mogok Mines – New & Previously Unseen 3D Mining Images and The Origins of Spinel – A 10 Year Research Summary On 16th September 2013, GRS held a seminar about the latest GRS expedition to the Mogok ruby, sapphire and spinel mines (Part I) as well as the world of magnificent spinels – provenance […]


Record-breaking discovery of ruby and sapphire at the Didy mine in Madagascar – Investigating the source

GemResearch Swisslab (GRS) is featured in the latest issue of ICA’s magazine InColor (issue Fall/Winter 2012). The article written by Dr. Adolf Peretti and Mr. Lawrence Hahn reports on the record-breaking discovery of ruby and sapphire at the Didy mine in Madagascar. It gives detailed account of how GRS has carried out the risky expedition […]


New world record Pigeon’s Blood rubies discovered in Madagascar

GRS seminar during the Hong Kong September 2012 Jewellery & Gem Fair New magnificent rubies were found in a National Park near Didy in Madagascar in May 2012. When the rough was first discovered, it was assumed to be impossible to have natural rubies in such size, clarity and color. Therefore the GRS Laboratory made an […]


GRS publishes the discovery of a new sapphire mine in Sri Lanka on Youtube

An extreme sapphire rush occurred in February in Sri Lanka which resulted in one of the most spectacular scenes in gemstone mining. GRS was there and collected never-seen movie clips, researched the rocks and collected samples. GRS is proud to publish its latest research on the legendary new sapphire mine near the Yala National Park […]


New generation of diffusion-treated sapphire appear in large numbers on the market

A large number of diffusion-treated stones are detected in the laboratory. The diffusion-treatment includes the well-known method of adding Titanium in the surface. Some of the material has been additionally Beryllium-treated. The new aspect of this treatment is that the treaters obviously select already heat-treated sapphire with internal blue color-zoning. Than the stones are diffusion-treated […]

Alerts, News

Volcanic host-rock of Tibetan red andesine discovered

Hong Kong – Historically, the finest red feldspar (sunstone) has come from deposits in Oregon (USA). While sunstone has also been found in other places like India and Tanzania, the Oregon deposits have set the gold standard. In 2002, rich red feldspars from another source appeared on world markets. The source was originally said to […]