Screening and Identifying of Synthetic Diamonds
with Standard and Advanced Instruments

Instructor: Branko Deljanin, B.Sc., GG, DGA, FGA, DUG
CGL Canadian Gemological Laboratory Inc., Canada
August 13, 2018 at Diamond Bourse of Canada
27 QUEEN STREET EAST, SUITE 701, TORONTO
Limited to 20 participants per half day session

9am-12.45.pm -OR- 1.30-5.15pm: IDENTIFICATION of NATURAL and SYNTHETIC DIAMONDS

• Types of diamonds based on nitrogen and boron content
• Methods of growing HPHT and CVD diamonds
• Inclusions in Natural and Synthetic diamonds
• UV lamp – reaction of different types of diamonds under LW and SW UV light (“PL inspector”)
• CPF (Cross Polarized Filters) method and instrumentation to screen and ID diamond’s origin
• Screening and ID of melee and Mounted diamonds – methods for ID and limitations
• COLOURLESS diamonds: sources/producers, characteristics and identification
• YELLOW and ORANGE diamonds: sources/producers, characteristics, and identification
• GREEN and OLIVE diamonds: source/producers, characteristics and identification
• BLUE diamonds: sources/producers, characteristics and identification
• PINK/RED diamonds: sources/producers, characteristics and identification
• Use of Standard Instruments to separate Coloured Natural and Synthetic Diamonds
• Use of Advanced Instruments (EXA) to separate Colourless Natural and Synthetic Diamonds

PRACTICAL WORKSHOP: Samples of Ia, IIa, IIb, Ib diamonds (natural synthetic origin) are tested with microscopes, mini UV lamp (“PL inspector”) and Mini Polarioscope with Portable “Synthetic Diamond ID Kit” (loupe, polariscope, light, UV lamp) and EXA Natural Detector will be available

• Handouts & Book “Fluorescence as a Tool for Diamond Origin ID ($40 Value) to participants
• Certificate of completion will be issued to all participants

 

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