Laboratory
Gemmological Institute of India (GII)
Mumbai, India
Gemstones, diamonds; treatment detection
The Gemmological Institute of India (GII), founded in Mumbai in 1971, runs a laboratory and a gemmology school.
What it does
Gemstone and diamond identification, treatment detection and diamond grading for the Indian trade.
Using any laboratory
- Ask what the report will state (identity, treatment, origin, grade) and how long it takes; turnaround and fees change.
- Check a report online with the laboratory's own report-check service, and match the stone to the report.
- Reports from different laboratories can differ, especially on colour grades, treatment and origin. A report is an opinion based on the tests made, not a valuation.
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