GemKrishna India · Kirti Nagar, New Delhi
A lab report is only worth something if you can check it. A printed certificate proves nothing on its own: anyone can print one. What proves it is the laboratory's own database showing the same stone, with the same weight and measurements, under the same report number.
This guide shows you how to do that check in about two minutes, for a stone bought from us or from anyone else.
Check a GJSPC report in four steps
- Find the report number. It is printed on the report card and, on every GemKrishna listing, in the product title. On our listings, gemstone reports begin with CS (for example CSQ0042803) and rudraksha reports with RD (for example RDQ0044374).
- Open GJSPC Report Check. Go to gjspc.in/ReportCheck, the laboratory's own website. Type the address yourself rather than following a link sent by a seller.
- Enter the report number exactly as printed, and submit.
- Compare the result with the stone in your hand, using the checklist below.
GJSPC itself notes that the online Report Check may not show every detail printed on the original report. It confirms that the report exists in their database and that its key details match.
What to compare
- Identification: the stone should be named exactly, such as natural emerald, natural hessonite garnet or natural rudraksha, 5 mukhi.
- Weight: carats (or grams for large pieces) should match to two decimal places. This is the hardest detail to fake, because a different stone will almost never weigh exactly the same.
- Dimensions in millimetres, shape and cut.
- Colour as described.
- Treatment or comments: heated, oiled, dyed, cultured and similar words matter enormously to value. Read this line carefully.
- Origin, if stated, such as Zambia for emerald or Nepal or Indonesia for rudraksha.
- Photograph, if shown, against your stone.
Rudraksha: why the X-ray report matters
A rudraksha's mukhi count is the number of natural lines running from end to end, and each mukhi corresponds to a seed chamber inside the bead. Extra lines can be carved on the surface, and beads can be joined with glue. From the outside, a skilled fake can look convincing.
An X-ray shows the inside. The number of internal chambers should match the mukhi count, and carved or joined beads show up clearly. GJSPC issues both a lab report and an X-ray report for every rudraksha GemKrishna sells, whatever its price. Water, copper coin and milk tests prove nothing either way; our guide on how to tell if a rudraksha is real explains why.
Red flags
- The report number returns nothing on the lab's website.
- The weight or dimensions on the website do not match the stone.
- The report is from a laboratory you cannot find online, or whose website has no report check.
- The certificate names the seller as the tester.
- A precious stone with no treatment line at all, or a seller who will not show you the report before you pay.
- The seller sends you a link to “verify” instead of letting you go to the lab's site yourself.
If a report does not check out, speak to the seller first, and keep your invoice and the report card.
The laboratories we use
Most GemKrishna reports are from GJSPC, and on request we can certify through one of the other independent laboratories below instead. Each offers report verification on its official website:
- GJSPC Laboratory, New Delhi: gjspc.in/ReportCheck
- GSI (Gemological Science International): Verify Report
- IGI (International Gemological Institute): report verification on igi.org
- GIA (Gemological Institute of America): Report Check on gia.edu
- GRS Swisslab (GemResearch Swisslab): report verification on gemresearch.ch
- IIGJ (Indian Institute of Gems & Jewellery): report verification on the institute's website
The method is the same everywhere: go to the lab's own site, enter the number, and compare weight, measurements, identification and treatment.
How GemKrishna uses lab reports
- Every gemstone and crystal product ships with a lab report, whether it costs ₹199 or several lakh.
- The report number is in the product title, so you can check it before you pay, not after.
- Treatment is stated in the title, not hidden in the description.
- Every rudraksha has a GJSPC lab report and an X-ray report.
- Plain silver jewellery has no lab report, because gem labs certify stones. BIS hallmarking with HUID certifies silver purity instead.
Questions about a report, ours or anyone else's? WhatsApp us on +91 76782 75972, 11 am to 9 pm. We are happy to help you read it.
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Frequently asked questions
How do I check a GJSPC report online?
Go to gjspc.in/ReportCheck, enter the report number printed on your report card, and compare the identification, weight, measurements, colour and treatment shown with your stone.
How can I tell if a gemstone certificate is fake?
Check the report number on the laboratory's own website. If it returns nothing, if the weight or measurements differ from your stone, or if the lab has no online verification, treat the certificate as unreliable.
What does a rudraksha X-ray report show?
It shows the internal seed chambers. Their number should match the mukhi count, and carved or glued fake beads become visible.
Which detail on a lab report is most important to match?
The exact weight, to two decimal places, followed by the measurements. A different stone will almost never match both.
Does silver jewellery come with a lab report?
Plain silver does not need one. Its purity is certified by BIS hallmarking with a HUID. Any stones set in the piece carry their own lab report.
Can I check a report for a stone I bought elsewhere?
Yes. The same steps work for any report from a laboratory with online verification, wherever you bought the stone.
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