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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.
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
    FAX- 033-22861716

    GSI, CR, Nagpur

    Additional Director General & HOD
    Central Region
    Geological Survey of India
    GSI Complex,Seminary Hills,
    Nagpur-440006, Maharashtra

    GSI, SR, Hyderabad

    Additional Director General & HOD
    Southern Region
    Geological Survey of India
    GSI Complex, Bandlaguda,
    Andhra Pradesh

    GSI, WR, Jaipur

    Additional Director General & HOD
    Western Region
    Geological Survey of India
    GSI Complex, Khanij Bhawan
    15-16, Jhalana Dungri,
    Jaipur-302004, Rajasthan

    GSI, NER, Shillong

    Additional Director General & HOD
    North Eastern Region
    Geological Survey of India
    GSI Office, Shylla Building,
    Nongrim Hills
    Shillong-793003 Meghalaya
For any feedback or issues, please write to ocbis.helpdesk@gsi.gov.in or call IP Phone 10013/10014, BSNL 033-2357-1775
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