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Ultimate guide to laboratory-grown diamonds | Part 2
Welcome
Welcome (3:17)
Copyright notice
Note regarding equipment
Section 0: Introduction
Introduction (1:46)
The difference between natural and laboratory-grown diamonds (2:35)
Logic of testing
Section 1: Observations - Natural vs laboratory-grown diamond
Objectives for Section 1 - Observations: Natural vs. laboratory-grown diamond
Crystal forms (4:57)
Crystal gallery
Laser inscription (1:41)
Inclusions
Graining
Colour zones
Blue nuance
Natural vs LG features - summary cheatsheet
Inclusions and feature gallery
Step-by step guide to identifying a diamond with observations only
Summary (1:55)
Quiz
Section 2.0: Basic tests
Objectives for Section 2: Basic tests
Section 2.1: Magnetism
Magnetism introduction
R.E.E magnets
Magnetism video (1:26)
Testing for magnetism on water (2:04)
How to test for magnetism
Prevalence of magnetic reaction (with examples)
Conclusions
Magnetism in natural diamonds
Quiz
Section 2.2: Electrical conductivity
Electrical conductivity (5:14)
Correct use of a diamond tester
Step-by-step guide: Using a diamond tester
Quiz
Section 2.3: UV testing
UV testing
Defects and fluorescence
Emitted energy and fluorescence colour
UV Equipment
Common UV responses - Strength of fluorescence
Common UV reactions - Colours of fluorescence
Common UV responses - Phosphorescence
Video of fluorescence and phosphorescence (0:31)
Common UV responses
Colourless diamond UV reactions
Yellow diamond UV reactions
Blue diamond UV reactions
Pink diamond UV reactions
Cubo-octahedral fluorescent patterns in HPHT (1:04)
Orange phosphorescence in HPHT (0:30)
Jewellery Inspector
Jewellery Inspector - Equipment sheet
GemPen (R)
GemPen (R) - Equipment sheet
Summary (2:29)
Quiz
2.4: Crossed polarising filters (CPF)
Strain effects
CPF and strain in diamond
How to set up CPF video (1:15)
Common strain patterns
Common strain patterns - cheatsheet
Video example of strain effects (0:57)
All strain effects
Cautions: Strain effects
Quiz
Section 2.5: Basic test summary
Step-by-step guide to identification through observation and basic tests
Summary for basic tests (3:19)
Quiz
Spectroscopy
Spectroscopy - Introduction
Spectroscopy explained
Section 3.0: Screening tests
Objectives for Section 3 - Screening equipment
Screening equipment (2:44)
Types of screening equipment (1:17)
Equipment sheets
Section 3.1: Screening tests - UV-Vis testing
UV-Vis testing
DiamondSure (TM) - video (2:38)
DiamondSure (TM)
DiamondSure (TM) - Equipment sheet
Quiz
Section 3.2: Screening tests - UV transparency testing
UV transparency testing (2:32)
UV transparency testers
Synthetic Diamond Screener II (SMS II)
Quiz
Section 3.3: Photoluminescence spectroscopy
Photoluminescence spectroscopy
GIA iD100 (R)
GIA iD100 (R) - Equipment sheet
EXA (TM)
EXA (TM) - Equipment sheet
Quiz
Section 3.4: Phosphorescence imaging
Phosphorescence imaging
SYNTHdetect - Equipment sheet
Sherlock Detector - Equipment sheet
PhosView - Equipment sheet
Step-by-step guide
3.5: Screening tests - Summary
Screening equipment - summary sheet
Step-by-step guide: Screening tests
Quiz
Section 4.0: Advanced testing
Objectives - Section 4: Advanced testing (1:33)
Advanced testing
Section 4.1: FTIR
FTIR spectroscopy (2:27)
FTIR spectra
FTIR absorption lines
Quiz
Section 4.2: UV-Vis-NIR
UV-Vis-NIR spectroscopy (1:10)
UV-Vis-NIR spectra
UV-Vis-NIR absorption lines
Quiz
Section 4.3: Photoluminescence (PL) spectroscopy
PL spectroscopy (0:38)
PL spectra
PL emission lines
Quiz
Section 4.4: EDXRF
EDXRF (1:27)
EDXRF - The science
Quiz
Section 4.5: Fluorescence imaging
DiamondView (TM)
Quiz
Section 4.6: Advanced testing - Summary
Summary Sheet
Summary (1:39)
Quiz
Section 5: Testing melee diamonds
Objectives - Section 5: Testing melee diamonds (2:18)
Bulk screening equipment for loose melee
Testing smaller diamond parcels and set melee
Magnetism (0:52)
UV testing
Quiz
Step-by-step guide
Colourless stones
Final Test
Final test instructions
Final Test
What's next?
Congratulations (0:39)
Feedback survey
Leave a review
Share your success
Get your CPD certificate
What's next?
Bulk screening equipment for loose melee
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