Description
- Overview: Identifying of Natural, Treated and Synthetic Diamonds
with Standard and Advanced Instruments
- Instructor: Branko Deljanin, B.Sc., GG, FGA, DUG (Gemmological Research Industries Inc, Canada)
- Location:EGM, 460 rue Sainte Catherine Ouest, suite 913, Montréal
- Flyer: 2020_10_10-ID_of_COLOURED_Diamonds.pdf
Day 2
ID of Coloured Diamonds – Treated and Lab-grown
9am-12.30pm: IDENTIFICATION of NATURAL and SYNTHETIC DIAMONDS
- BROWN diamonds: sources/producers, characteristics and identification
- YELLOW and ORANGE diamonds: sources/producers, characteristics, and identification
- GREEN and CHAMELEON diamonds: source/producers, characteristics and identification
- BLUE diamonds: sources/producers, characteristics and identification
- PINK/RED diamonds: sources/producers, characteristics and identification
- Use of Synthetic Diamond ID Kit to separate Colored Natural and Synthetic Diamonds
PRACTICAL WORKSHOP: Microscopy –inclusions for HPHT and CVD synthetics, UV lamp – colours of fluorescence/phosphorescence and Cross Polarized Filters (CPF) patterns for synthetic origin.
1.30-5.00pm: IDENTIFICATION of TREATED NATURAL and SYNTHETIC DIAMONDS
- Clarity and Color Enhancements – unstable (Fracture Filling and coating),
- Clarity Enhancements – stable (Traditional Lasering, KM Laser drilling)
- Processes for colour treatments of diamonds, natural and synthetic
- Color Enhancements – stable (irradiation, annealing, HPHT, multistep treatments)
- Post treatments of HPHT-grown and CVD-grown diamonds (irradiation)
- Identification methods for treated diamonds with advanced instruments at labs
- Grading of Colored diamonds with Munsell chips, masters using GIA and CGL-GRS system
- Certification of treated and synthetic diamonds at gem laboratories
PRACTICAL WORKSHOP: Coloured Diamonds are tested with microscopes, mini UV lamps, (PL inspectors), portable polariscopes, Jewellery Inspectors and portable spectrometer (EXA) for origin
- Portable “Synthetic Diamond ID Kit” (polariscope, lights, PL inspector), EXA will be available
- Certificate of completion will be issued to all participants
