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 25, 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
– Types of diamonds based on nitrogen and boron content
– Colourless Natural diamonds: sources, characteristics and identification
– Methods of growing HPHT and CVD diamonds
– Inclusions in Natural and Synthetic diamonds
– UV lamp – reaction of different types of diamonds under LW/ SW UV (“PL inspector”)
– CPF (Cross Polarized Filters) method and instrumentation to screen and ID diamonds
PRACTICAL WORKSHOP: Samples of Ia, IIa, IIb, Ib diamonds (natural synthetic
origin) are tested with microscopes, PL inspector and Mini Polarioscope with Portable light
1.30-5.00pm: SCREENING for TREATMENTS of NATURAL and SYNTHETIC
DIAMONDS
– Testing and screening methods for treated diamonds with standard instruments
– Post treatments of CVD-grown diamonds and HPHT-grown diamonds
– ID of mounted synt. diamonds with EXA instrument and screening instruments
– Problems and solution in identification of melee natural and synthetic diamonds
PRACTICAL WORKSHOP: Colorless Diamonds are tested with microscopes, mini UV
lamps, CPF (portable polarioscopes) and portable spectrometer for natural, treated or synthetic
origin
- Portable “Synthetic Diamond ID Kit” (loupes, polarioscope, lights, UV lamps) will be
available
