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From its existence, GSI entered into Gem Testing as an aid to render public service during mid sixties. From a humble beginning it has grown into a leading center of gem testing in the country instilling consumer confidence among one and all.

The Gemmology Laboratory of GSI assumes a special significance with the booming gemstone business getting mixed up with synthetics, simulants and imitation stones .GSI provides commercial service for identification, authentication and certification of the gemstones. The Mineralogical Report is prepared based on the non-destructive analysis of the gemstones. It comprises essential physical and optical constants along with internal inclusion pattern to arrive at the name of the mineral and its gem variety.

The report also indicates a qualitative assessment of the gemstone based on 4 ‘Cs’ (Cut, Carat weight, Colour and Clarity). Special characters like spectroscopic result, optical effects and external flaws are mentioned under the heading ‘Other Characters’ of the report.
Gemstudies
Gem samples as received for testing

Standard Operating Procedure

Existing location:

    NCEGR, Kolkata

    Additional Director General
    National Mission Head-IV
    Central Headquater
    Geological Survey of India
    15 A & B Kyd Street
    Kolkata-700016
    FAX- 033-22861716
    Email-hodm4@gsi.gov.in

    GSI, CR, Nagpur

    Additional Director General & HOD
    Central Region
    Geological Survey of India
    GSI Complex,Seminary Hills,
    Nagpur-440006, Maharashtra
    FAX-0712-2511671
    Email-hod.cr@gsi.gov.in

    GSI, SR, Hyderabad

    Additional Director General & HOD
    Southern Region
    Geological Survey of India
    GSI Complex, Bandlaguda,
    Hyderabad-500068
    Andhra Pradesh
    FAX-040-24220958
    Email-hod.sr@gsi.gov.in

    GSI, WR, Jaipur

    Additional Director General & HOD
    Western Region
    Geological Survey of India
    GSI Complex, Khanij Bhawan
    15-16, Jhalana Dungri,
    Jaipur-302004, Rajasthan
    FAX-0141-2711100
    Email-hod.wr@gsi.gov.in

    GSI, NER, Jaipur

    Additional Director General & HOD
    North Eastern Region
    Geological Survey of India
    GSI Office, Shylla Building,
    Nongrim Hills
    Shillong-793003 Meghalaya
    FAX-0364-2520033
    Email-hod.ner@gsi.gov.in
Copyright 2017 © Geological Survey of India
Copyright 2017 © Geological Survey of India
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