Description
Please inquire about similar workhop in your city as we are giving workshops in over 20 countries on 4 continents.
Previous gemmological education required
Instructor: Branko Deljanin, B.Sc., GG, FGA, DUG
Dates:
November 26th, 2024 – Workshop at CGL Canadian lab or conference room at United Kingdom Building, 409 Granville street, Vancouver, Canada.
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 Standard Instruments to separate Coloured Natural and Synthetic Diamonds
PRACTICAL WORKSHOP: Microscopy – metallic inclusions for HPHT synthetic and UV lamp – colours of fluorescence are giving indication of treated/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, HPHT)
– Identification methods for treated diamonds with advanced instruments at labs
– Certification of treated and synthetic diamonds at gem laboratories
PRACTICAL WORKSHOP: Coloured Diamonds are tested with microscopes, mini UV lamps, CPF (portable polarioscopes) and portable VIS and EXA spectrometers for natural, treated or synthetic origin
- Portable “Synthetic Diamond ID Kit” (loupes, polarioscope, lights, UV lamps) portable VIS and EXA spectrometers will be available
