SHIVRAJ WAGH
Sr. Lab Manager Cum Gemologist
Surat
Summary
Over 14 years in the diamonds and jewelry industry, specializing in diamond grading and gemstone identification. Currently serving as Senior Lab Manager at Gemological Science International, Surat, India, a subsidiary of GSI New York. Proven expertise in testing natural diamonds and managing laboratory operations.
Overview
15
15
years of professional experience
4
4
Languages
Work History
Sr. Lab Manager
GEMOLOGICAL SCIENCE INTERNATIONAL (GSI)
07.2011 - Current
- Collaborated with GSI across multiple locations including Mumbai and Surat from July 2011 to January 2017.
- Dubai (UAE) - February 2017 – May 2024
- Surat (India) - June 2024 - Present.
- Total working duration at GSI: July 2011 – Present.
- Accountable for quality assessment of stones evaluated by initial graders using GIA Diamond Grading System
- Graded rounds and fancy-shaped diamonds weighing 0.18 carats and above. Evaluated quality and specifications of diamonds to ensure compliance with industry standards. Conducted assessments based on cut, clarity, color, and carat weight for optimal grading accuracy.
- Evaluating diamond clarity using microscope and loupe
- Evaluated diamond jewellery using microscope and loup
- Sorting +00 to +11 size diamonds
- Evaluating diamond colors using PANTONE color viewing light
- Plotting clarity attributes utilizing digital plotting in Coral Draw
- Assessing diamond color using master set standards.
- Assigning Polish and Symmetry based on GIA Diamond grading system
- Examining fluorescence properties of diamonds under UV lamp exposure
- Engraving inscriptions on diamonds utilizing DiaScribe machine.
- Utilization of FTIR and Raman for identifying natural or synthetic diamond through spectral analysis
- Contributes to ongoing development of Prelim check graders, Double check graders, and Triple check graders through feedback and guidance
- Verifies precision of preliminary work
- Interacts effectively with co-workers and management, maintaining professionalism under pressure
- Guided new trainees through mentoring and development as prelim graders.
- Facilitating and directing Rapid Improvement Events and Process Planning Events
- Facilitating management of production and personnel as Team Leader for flow cell team
- Oversee multiple service departments including HR and Admin in Surat and Dubai.
- Direct ISO Audit initiatives as Quality Manager for Dubai branch.
- Played a significant role in the setup and operational launch of GSI Bangkok (Thailand) office in 2025, contributing to laboratory readiness, staff training, workflow implementation, and adherence to global GSI quality standards.
Education
Bachelor of Arts - Psychology
Pune University
Diploma - Gemology
GEMOLOGICAL INSTITUTE OF INDIA
Diploma - Diamond Grading
INTERNATIONAL GEMOLOGICAL INSTITUTE
Skills
Diamond grading proficiency Color, cut, clarity, and carat analysis Gem evaluation skills Quality assurance
SOFTWARE PROFICIENCY
Applications: MS-Office, Corel Draw & Photoshop
Timeline
Sr. Lab Manager
GEMOLOGICAL SCIENCE INTERNATIONAL (GSI)
07.2011 - Current
Bachelor of Arts - Psychology
Pune University
Diploma - Gemology
GEMOLOGICAL INSTITUTE OF INDIA
Diploma - Diamond Grading
INTERNATIONAL GEMOLOGICAL INSTITUTE