Joshua Walker

• Phone: +44 7911 123456
• Email: joshua.walker@email.com
• Location: London, UK
• LinkedIn: joshua-walker-gem

Summary

Over 12 years of expertise in diamond grading, gem identification, and precious stone valuation, specializing in GIA and HRD standards. Successfully managed quality control for high-value diamond inventories, ensuring authenticity and market compliance for leading London jewelers.

Proficient in advanced gemological equipment operation, including Raman spectroscopy and FTIR analysis, to accurately assess gem origin and treatments. Developed and implemented efficient sorting protocols that reduced processing time by 15%.

Experience

Senior Diamond Grader & Valuer, Graff Diamonds -- London, UK

Mar 2017 – present

• Lead grading operations for diamonds exceeding 5 carats, applying stringent GIA 4Cs and international standards, contributing to over £50M in annual sales.

• Conducted comprehensive gemological analyses for rare and investment-grade stones, providing detailed reports for high-net-worth clientele.

• Mentored junior gemologists and graders on advanced identification techniques and ethical sourcing practices, improving team efficiency by 20%.

• Managed and maintained a secure inventory of loose diamonds and precious gemstones, ensuring traceability and preventing loss across multiple sites.

Gemstone Specialist & Polisher, Boodles -- London, UK

Sept 2012 – Feb 2017

• Executed precision cutting and polishing of rough diamonds and various gemstones to maximize brilliance and market value, consistently achieving excellent cut grades.

• Performed meticulous quality control checks on finished stones to ensure adherence to design specifications and Boodles' exceptional standards.

• Collaborated with design teams to optimize stone selection and placement for bespoke jewelry pieces, enhancing aesthetic appeal and structural integrity.

• Maintained and calibrated specialized cutting and polishing machinery, reducing equipment downtime by 10% through proactive maintenance schedules.

Junior Gemstone Assessor, Mappin & Webb -- London, UK

July 2010 – Aug 2012

• Assisted senior gemologists in sorting, identifying, and cataloging a wide range of precious and semi-precious gemstones.

• Operated spectroscope, refractometer, and microscope for initial gem identification and property assessment.

• Prepared detailed inventory reports and maintained records of incoming and outgoing stone shipments, ensuring accuracy and security.

• Learned and applied fundamental principles of gem treatment detection and origin determination under direct supervision.

Education

Gemological Institute of America (GIA), Diploma in Graduate Gemologist Diploma -- London, UK

Sept 2009 – June 2010

University of Birmingham, BSc (Hons) in Geology with Gemmology -- Birmingham, UK

Sept 2006 – July 2009

Skills

Diamond Grading & Identification: GIA 4Cs, HRD Antwerp Standards, Diamond Clarity Enhancement Detection, Synthetic Diamond Identification, Rough Diamond Evaluation

Gemstone Expertise: Colored Stone Identification, Origin Determination, Treatment Detection, Pearl Grading, Precious Metal Identification

Gemological Equipment: Microscopy, Refractometry, Spectrometry (UV-Vis-NIR, Raman, FTIR), Polariscope, Dichroscope, DiamondSure/DiamondView

Jewellery Manufacturing & Repair: Precision Cutting, Polishing, Faceting, Setting Techniques, Jewellery Appraisal, Quality Control

Software & Compliance: Gemstone Inventory Management Systems, Microsoft Office Suite, Kimberley Process Certification, Responsible Sourcing Practices