NGTL offers comprehensive laboratory services for gemstones and diamonds:
- Diamond Grading & Certification: Professional diamond grading reports using international standards (GIA,CIBJO). Assessment of cut, color, clarity, and carat weight.
- Gemstone Identification & Testing: Identify natural, synthetic, and treated gemstones. Complete gemological analysis for rubies, sapphires, emeralds, and other precious stones.
- Treatment Detection: Advanced analysis to identify heat treatment, irradiation, fracture filling, coating, and other enhancements on gemstones.
- Origin Certification: Scientific determination of geographical origin for rubies, sapphires, and emeralds using spectroscopic analysis.
- Lab-Grown Diamond Detection: Advanced identification of synthetic diamonds (CVD, HPHT) using cutting-edge D-Vision Pro technology.
- Diamond Simulant Identification: Distinguish diamonds from simulants like cubic zirconia, moissanite, YAG, and other diamond imitations.
- Jewelry Testing: Gemstone and diamond analysis for studded jewelry pieces.
Expert Team of Gemmologists & Scientists
NGTL’s laboratory is managed by India’s most experienced and qualified professionals:
- PhD-Qualified Scientists: Advanced degrees in gemmology, materials science, and chemistry
- Experienced Gemmologists: Decades of field and laboratory experience in gemstone analysis
- Published Researchers: Contributors to international gemmological journals and research publications
- International Certification: Recognized by major gemmological organizations worldwide
- Continuous Training: Regular participation in international conferences and advanced training programs
- This expert team ensures that every gemstone and diamond tested at NGTL receives the highest level of scientific analysis and professional certification.
Frequently Asked Questions About Laboratory Services
How long does diamond grading take at NGTL?
Diamond grading typically takes 3-5 business days depending on the complexity of the analysis and current volume. Express services may be available upon request.
Is NGTL’s diamond grading recognized internationally?
Yes. NGTL’s diamond grading reports are recognized and accepted internationally by diamond traders, jewellers, exporters, insurance companies, and gemological organizations worldwide.
Can you identify lab-grown diamonds?
Yes. NGTL has advanced equipment including D-Vision Pro for detecting lab-grown diamonds (CVD and HPHT). This is one of our specialized services.
What is the cost of diamond grading certification?
Diamond grading costs vary based on stone weight, complexity, and services required. Please contact us at +91-8828889230 or marketing@NGTLonline.com for a quote.
Can you test gemstones in jewellery settings?
*Yes. NGTL can test gemstones in studded jewellery pieces without removal. Our advanced instruments allow safe analysis of mounted stones.
What gemstones can you test?
NGTL tests all types of gemstones including diamonds, rubies, sapphires, emeralds, and hundreds of other precious and semi-precious stones. We also identify synthetic and treated gemstones.
Can you determine where a gemstone comes from?
Yes. NGTL provides origin certification for gemstones like rubies, sapphires, and emeralds using advanced instruments.
How do I submit gemstones for testing?
You can visit our laboratory or contact us to discuss your specific requirements. We handle submissions from individual customers, jewellers, exporters, and institutions.