Contact Us

Laboratory Services

GII Gem Testing & Certification : Diamond Grading Laboratory Services in India

Our Diamond Grading & Gem Testing Services

GII 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

This expert team ensures that every gemstone and diamond tested at GII receives the highest level of scientific analysis and professional certification.GII’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 GII receives the highest level of scientific analysis and professional certification.

Government Recognition & Certification

GII is the only gem testing trade laboratory in India with a full-fledged research center approved by the Department of Science & Technology, Government of India as a SIRO (Scientific and Industrial Research Organization) Laboratory. This unique recognition establishes GII as India’s premier gemological testing and research facility.

Testing Services Scope:

  • Identification of natural, synthetic, and treated gemstones
  • Detection of various kinds of treatments for color and clarity enhancement
  • Determination of gemstone country of origin
  • Comprehensive gemological analysis using state-of-the-art equipment

Our Laboratory Testing Process

GII maintains strict protocols to ensure unbiased, objective analysis:

  1. Anonymous Submission:
  2. Bar-Coded Labeling: Each item receives a unique bar-coded label with an internal identification number.
  3. Secure Tracking: Items are tracked throughout the laboratory process using the unique identification number.
  4. Confidential Processing: Client information is masked within the laboratory software system.
  5. Advanced Analysis: Professional gemologists and scientists conduct thorough analysis using sophisticated instruments.
  6. Quality Verification: Multiple checks ensure accuracy of findings and consistency with international standards.
  7. Detailed Report: Comprehensive certification report is issued with all findings and assessments.
  8. Secure Return: Gemstones are securely returned with official certification documents.

This rigorous process ensures complete objectivity and the highest level of professional certification.

Frequently Asked Questions About Laboratory Services

How long does diamond grading take at GII?

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 GII’s diamond grading recognized internationally?

Yes. GII’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. GII 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@giionline.com for a quote.

Can you test gemstones in jewellery settings?

*Yes. GII can test gemstones in studded jewellery pieces without removal. Our advanced instruments allow safe analysis of mounted stones.

What gemstones can you test?

GII 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. GII 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.

GET IN TOUCH

+918828889230

marketing@giionline.com

The first Research & Development Laboratory in the field of Gemstones in India recognized by the Department of Science & Technology, Government of India as SIRO.

Facebook Instagram Twitter Youtube

Useful Links

History

Board of Trustees

Gallery

Privacy policy

Terms of Use

Quick Links

Home

Laboratory Services

Research

Seminars

Bulletin

Contact US

©2025 GII | All Rights Reserved | Web Design Services by GIII