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Course Curriculum

Part 2: The ultimate online course on laboratory-grown diamonds

How to identify laboratory-grown diamonds

Course page for the laboratory-grown diamond online course with The Gem Academy featuring Julia Griffith


  • Welcome to the course

  • Copyright notice

  • Note regarding equipment

  • Glossary PDF download

How to identify HPHT and CVD laboratory-grown diamonds using observations, basic tests and screening equipment

0. Introduction

  • Introduction

  • The difference between natural and laboratory-grown diamonds

  • Logic of testing

Colour zoning in HPHT blue type IIb laboratory-grown diamond showing features in HPHT diamonds - how to identify lab-grown diamonds

1. Observations: Natural vs laboratory-grown diamonds

  • Objectives

  • Crystal forms

  • Crystal gallery

  • Inclusions

  • Graining

  • Colour zones

  • Blue nuance

  • Laser inscriptions

  • Summary cheatsheet PDF

  • Step-by-step guide for identification

  • Summary

  • Quiz

Cause of fluorescence effects in laboratory and natural diamonds so you can identify and separate these stones

2. UV testing

  • Objectives

  • UV testing

  • UV equipment

  • Defects and fluorescence

  • Common UV responses

  • Video example of fluorescence and phosphorescence

  • Colourless diamond UV responses

  • Yellow diamond UV responses

  • Blue diamond UV responses

  • Pink diamond UV responses

  • Cubo-octahedral fluorescent patterns in HPHT LGD's

  • Orange phosphorescence in HPHT

  • Summary

  • Quiz

basic tests for identifying lab-grown diamonds - CPF crossed polarised filters, birefringence in diamonds

3. Other basic tests

  • Objectives

  • Magnetism

  • Testing for magnetism on water

  • Magnetism in natural diamonds

  • Electrical conductivity

  • Strain effects

  • Strain effects - cheatsheet

  • Video examples of strain

  • Cautions: strain effects

  • Step-by-step guides of identification

  • Summary

  • Quiz

electromagnetic spectrum and spectroscopy relevant for testing natural vs lab-grown diamonds


  • Introduction

  • Spectroscopy explained

screening equipment cheatsheets for using testing equipment for identifying and separating laboratory-grown CVD and HPHT diamonds from natural

4. Screening equipment

  • Objectives

  • What does screening equipment do?

  • Types of screening equipment

  • Screening equipment summary sheet

  • Equipment sheets

  • PL-Inspector

  • GemPen®

  • DiamondSure™

  • DiamondSure™ equipment sheet

  • UV transparency testing

  • Synthetic Diamond Screener II (SMSII)

  • Photoluminescence spectroscopy

  • GIA iD100®

  • GIA iD100® equipment sheet

  • EXA™

  • EXA™ equipment sheet

  • Phosphorescence imaging

  • SYNTHdetect

  • Sherlock Detector

  • PhosView

  • Step-by-step guide for identification

  • Quiz

advanced testing spectra for identifying CVD and HPHT laboratory-grown diamond from natural diamond Photoluminescence PL spectrum

5. Advanced testing

  • Objectives

  • FTIR spectroscopy

  • FTIR spectra

  • FTIR absorption lines

  • UV-Vis-NIR spectroscopy

  • UV-Vis-NIR spectra

  • UV-Vis-NIR absorption lines

  • PL spectroscopy

  • PL spectra

  • PL emission lines


  • EDXRF - the science

  • DiamondView

  • Summary sheet

  • Step-by-step guide

  • Summary

  • Quiz

laboratory grown type IIa and Type IIb =CVD and HPHT diamonds

6. Testing melee diamonds

  • Objectives

  • Bulk screening for loose melee

  • Testing smaller diamond parcels and set melee

  • Magnetism

  • UV testing

  • Quiz

Good luck poster for the final exam in this online gemmology course

Online exam

  • Final test: Instructions

  • Good luck

  • Final test

congratulations for completing this course on how to identify lab-grown diamonds

What next?

  • Congratulations

  • Leave a review

  • Share your success

  • What's next?

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