GRS-CGL.COM

GemResearch Swisslab (GRS) Specializing in Origin Determination of Fine Rubies and Sapphires

GRS Gemresearch Swisslab AG. PO Box 3628, 6002 Lucerne, Switzerland. Public limited company of Canton of Lucerne, Switzerland. GRS Lab (Hong Kong) Ltd. Phone: 852 2376 3888. Fax: 852 2568 3888. DR Peretti Co., Ltd. Unit 501-506, 5 th Floor, Silom 19 Building. Soi 19, Silom Road, Bangrak, Bangkok 10500, Thailand. Phone: (66 2) 237-5898 and 000-4628. Fax: (66 2) 237-5899 and 000-6167. GRS Lanka (PVT), Ltd. 471 3/1 Galle Road. Phone: 94 112 500 666. FAX: 94 11 2 582 493. Welcome to GRS GemResearch Swisslab.

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GRS Gemresearch Swisslab AG

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CH

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Adolf Peretti

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CH

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GemResearch Swisslab (GRS) Specializing in Origin Determination of Fine Rubies and Sapphires | grs-cgl.com Reviews

<META> DESCRIPTION

GRS Gemresearch Swisslab AG. PO Box 3628, 6002 Lucerne, Switzerland. Public limited company of Canton of Lucerne, Switzerland. GRS Lab (Hong Kong) Ltd. Phone: 852 2376 3888. Fax: 852 2568 3888. DR Peretti Co., Ltd. Unit 501-506, 5 th Floor, Silom 19 Building. Soi 19, Silom Road, Bangrak, Bangkok 10500, Thailand. Phone: (66 2) 237-5898 and 000-4628. Fax: (66 2) 237-5899 and 000-6167. GRS Lanka (PVT), Ltd. 471 3/1 Galle Road. Phone: 94 112 500 666. FAX: 94 11 2 582 493. Welcome to GRS GemResearch Swisslab.

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1 gemresearch swisslab

2 adolf peretti

3 grl

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5 sem

6 scanning election microscope

7 future gemmological research

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9 geology

10 mineralogy

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unit b 6/f,9 queen's road,central,hong kong,colombo 3,news,reports,lab reports,ireport,platinum award,prices,enhancement disclosure,report samples,research,analytical methods,inclusions,origin,research videos,research message,publications,grs journal,ce o

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GemResearch Swisslab (GRS) Specializing in Origin Determination of Fine Rubies and Sapphires | grs-cgl.com Reviews

https://grs-cgl.com

GRS Gemresearch Swisslab AG. PO Box 3628, 6002 Lucerne, Switzerland. Public limited company of Canton of Lucerne, Switzerland. GRS Lab (Hong Kong) Ltd. Phone: 852 2376 3888. Fax: 852 2568 3888. DR Peretti Co., Ltd. Unit 501-506, 5 th Floor, Silom 19 Building. Soi 19, Silom Road, Bangrak, Bangkok 10500, Thailand. Phone: (66 2) 237-5898 and 000-4628. Fax: (66 2) 237-5899 and 000-6167. GRS Lanka (PVT), Ltd. 471 3/1 Galle Road. Phone: 94 112 500 666. FAX: 94 11 2 582 493. Welcome to GRS GemResearch Swisslab.

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grs-cgl.com

1

GRS Analytical Methods | GRS GemResearch Swisslab AG

http://www.grs-cgl.com/AnalyticalMethods.htm

An essential and very important aid for the observation of internal features of gemstones. The inclusions of certain minerals or gemstones are very typical for its geographical origin. By using a microscope, heat-treatments and other clarity enhancements can be identified. A ratio, which indicates the ‘optical density’ of a substance. It is related to the angles of incidence and refraction of light. The refractive index is different for most gem-species. FTIR Spectroscopy (Fourier Transform Infrared).

2

Gemstone Reports | GRS GemResearch Swisslab AG

http://www.grs-cgl.com/report.htm

GRS gemstone reports are issued for individual loose gemstones, gemstone pairs, gemstone sets, as well as for mounted jewellery (rings, ear clips and necklaces etc.) providing the mounting allows for adequate testing. GRS gemstone reports include the following data based upon our judgment on the day of testing:. Each report bears a unique 10 or 11 digit number, e.g. 2107-078888. This individual document number is critical to substantiate a reports’ authenticity. Cut refers to the facet pattern, e.g&#...

3

Prices | GRS GemResearch Swisslab AG

http://www.grs-cgl.com/prices.htm

Please contact us directly for our latest prices and turnaround times. Refer to our Shipping Information. Page for complete details regarding shipping your stones to us. We will respond promptly with a quote and more information. 41 41 210 31 31. 94 112 500 666. GRS Alert: Unusual phosphorescent pebbles identified as synthetic aggregates. GRS Alert: A new type of synthetic spinel appears at the Bangkok show. GRS Alert: New spinel treatment discovered involving heat- and cobalt-diffusion.

4

Contact | GRS GemResearch Swisslab AG

http://www.grs-cgl.com/submit.htm

Shipping and Laboratory Address. GRS Gemresearch Swisslab AG. T: 41 41 210 31 31. F: 41 41 210 31 34. Meeting Room and Reception of Stones (by appointment only). GRS Gemresearch Swisslab AG. GRS Gemresearch Swisslab AG. GRS Lab (Hong Kong) Limited. Unit B, 6th Floor,. 9 Queen’s Road Central,. T: 852 2376 3888. F: 852 2368 3888. DR Peretti Co., Ltd. Unit 501-506, Silom 19 Building. Soi 19, Silom, Bangrak. T: 66 2237 5898 / 66 2000 4628. F: 66 2237 5899 / 66 2000 6167. GRS Lanka (PVT) Ltd. T: 94 112 500 666.

5

Video Library | GRS GemResearch Swisslab AG

http://www.grs-cgl.com/video.htm

GRS documentary 2016: Colombian Emerald Mines – Cunas Mine Underground. GRS documentary 2015: A journey to Mogok. GRS documentary 2015: Interesting discoveries at the Mandalay gemstone market. GRS education 2015: Heat treatment of spinel in Mogok, Burma (Myanmar). GRS education 2015: Perettiite crystal in Phenakite. GRS documentary 2012: New world record ‘Pigeon’s Blood’ rubies discovered in Madagascar – Part 6/6. GRS documentary 2012: Sri Lanka new sapphire mine – Kataragama. Colombian Emerald Mines &#8...

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GemResearch Swisslab (GRS) Specializing in Origin Determination of Fine Rubies and Sapphires

GRS Gemresearch Swisslab AG. PO Box 3628, 6002 Lucerne, Switzerland. Public limited company of Canton of Lucerne, Switzerland. GRS Lab (Hong Kong) Ltd. Phone: 852 2376 3888. Fax: 852 2568 3888. DR Peretti Co., Ltd. Unit 501-506, 5 th Floor, Silom 19 Building. Soi 19, Silom Road, Bangrak, Bangkok 10500, Thailand. Phone: (66 2) 237-5898 and 000-4628. Fax: (66 2) 237-5899 and 000-6167. GRS Lanka (PVT), Ltd. 471 3/1 Galle Road. Phone: 94 112 500 666. FAX: 94 11 2 582 493. Welcome to GRS GemResearch Swisslab.

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