Instructor: Branko Deljanin, B.Sc., GG, FGA, DUG (CGL-GRS Lab, Canada)
Assistant: Elena Deljanin, M.Sc. FGA, Gemmological Research Industries Inc.
Date: Oct 6, 2018
Location:Grand Pacific Palisades Resort & Hotel – 5805 Armada Dr. Carlsbad, CA
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
- Certification of treated and synthetic diamonds at gem laboratories
PRACTICAL WORKSHOP: Coloured Diamonds are tested with microscopes, mini UV lamps, (PL inspectirs), CPF (portable polariscopes) and Jewellery Inspectors for mounted diamonds
- Portable “Synthetic Diamond ID Kit” (loupes, polariscope, lights, UV lamps) will be available
- Certificate of completion will be issued to all participants