Certified Excellence
Authenticate your gemstones with confidence
Every certificate issued by SG&TL is backed by rigorous scientific testing, advanced instrumentation, and internationally recognized gemological standards.
Report Verification
Instant certificate lookup
Enter the report number from your SG&TL certificate to verify authenticity.
Scan this QR code for instant certificate verification.
About Us
India's trusted gemstone laboratory
Delivering scientific precision and transparency to India's vibrant gemstone trade since 2000.
Precision meets heritage
SG&TL was founded with a singular mission: to bring world-class gemological testing to India's thriving jewellery industry. Based in the heart of India's gem trade, our laboratory combines cutting-edge instrumentation with deep gemological expertise.
We understand the unique needs of the Indian market and provide certification that international buyers and domestic consumers trust equally.
Our team of certified gemologists holds leading Indian gemological institutes, ensuring every report meets the highest global standards.
State-of-the-Art Laboratory
Equipped with Raman spectroscopy, FTIR, UV-Vis-NIR spectrometer, EDXRF, and gemological microscopes for comprehensive analysis.
Our Services
Comprehensive gemstone analysis
From identification to origin determination, our laboratory offers a full suite of gemological services.
Gemstone Identification
Full scientific identification using Raman spectroscopy, FTIR analysis, and gemological microscopy to establish species and variety.
Treatment Disclosure
Comprehensive detection of enhancements including heat treatment, fracture filling, diffusion, and irradiation with full transparency.
Origin Determination
Geographic origin analysis using trace element chemistry and inclusion studies to establish provenance for fine gemstones.
Testimonials
Trusted by India's finest
Jewellers, traders, and collectors across India rely on SG&TL for accurate and transparent gemstone certification.
"SG&TL's reports have become the gold standard in our showroom. Our customers trust the certification instantly. The turnaround time is exceptional — we get reports within 10 Min."
"As a second-generation gem dealer, I've worked with many labs. SG&TL combines modern technology with genuine expertise. Their origin reports for Colombian emeralds have helped us command premium prices."
"I purchased a Neelam for my engagement and the SG&TL certificate gave my family complete peace of mind. The QR verification is brilliant — my father-in-law checked it himself on his phone. Very professional service."
FAQ
Common questions
Everything you need to know about our gemstone testing and certification services.
Standard reports are delivered within 10 Min. Walk-in submissions at our lab are also welcome during business hours.
We test all natural gemstones including diamonds, rubies, emeralds, sapphires (Neelam), cat's eye (Lehsunia), yellow sapphire (Pukhraj), coral (Moonga), pearl (Moti), hessonite (Gomed), and all other precious and semi-precious stones popular in Indian astrology and jewellery.
Yes! Every SG&TL certificate comes with a unique report number and QR code. You can verify it instantly on our website by entering the report number or scanning the QR code with your phone camera. The verification is available 24/7.
Absolutely. We specialize in testing all nine Navratna gemstones — Ruby (Manik), Pearl (Moti), Coral (Moonga), Emerald (Panna), Yellow Sapphire (Pukhraj), Diamond (Heera), Blue Sapphire (Neelam), Hessonite (Gomed), and Cat's Eye (Lehsunia). Our reports clearly state natural origin, any treatments, and suitability for astrological use.
Our pricing depends on the type of analysis required. We offer bulk pricing for jewellers and trade clients. Contact us for a detailed quotation.
Our laboratory uses advanced instruments like Raman spectroscopy, FTIR, and photoluminescence to distinguish natural from synthetic or treated stones. The difference is often invisible to the naked eye, which is why scientific testing is essential before any significant purchase — especially for high-value Jyotish gems.