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November 23-25, 2019 – Dubai, UAE – Advanced Diamond Workshops

Day 1: November 23, 2019 (Saturday)
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: 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: Coloured Diamonds are tested with microscopes, mini UV lamps (PL inspectors), Gempen, portable polariscopes, Jewellery Inspectors and portable spectrometer (EXA) for origin

  • Portable “Synthetic Diamond ID Kit” (polariscope, lights, PL inspector), EXA machine available
  •  Certificate of completion will be issued to all participants

Day 2: November 24, 2019 (Sunday)
ID of Colourless Diamonds – Treated and Lab-grown

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 and SW UV light (“PL inspector”)
  • CPF (Cross Polarized Filters) method and instrumentation to screen and ID diamond’s origin

PRACTICAL: Samples of Ia, IIa, IIb, Ib diamonds (natural synthetic origin) are tested with microscopes, UV lamp (“PL inspector”), Mini Polariscope with light, EXA, Alrosa Diamond Inspector

1.30-5.00pm: SCREENING for TREATMENTS of NATURAL and SYNTHETIC DIAMONDS

  • Clarity and Color Enhancements – unstable (fracture filling and coating)
  • Clarity Enhancements – stable (traditional lasering, KM Laser drilling)
  • Testing and screening methods for treated diamonds with standard instruments
  • Post treatments of CVD-grown colorless diamonds (by HPHT press)
  • ID of HPHT-enhanced diamonds using advanced instruments
  • ID of mounted synthetic diamonds with EXA, Alrosa Inspector and screening instruments
  • Problems and solution in identification of melee natural and synthetic diamonds

PRACTICAL: Colorless Diamonds are tested with microscopes, mini UV lamps, portable polarioscopes, Gempen and portable spectrometer (EXA) for natural, treated or synthetic origin

  • Portable “Synthetic Diamond ID Kit”, Alrosa Diamond Inspector, EXA machine are available
  • Certificate of completion will be issued to all participants

 

Day 3: November 25, 2019 (Monday)
Practical Intense Seminar: Screening & ID of Diamonds

Morning (9:00 AM to 12:45 PM): ID of Colourless Diamonds (Natural, Treated, and Lab-grown)

  • 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 diamonds, loose/mounted with “PL / Jewellery inspectors”)
  • CPF (Cross Polarized Filters) method and to screen and ID diamond’s origin
  • Clarity and Color Enhancements – unstable (Fracture Filling and coating),
  • Clarity Enhancements – stable (Traditional Lasering, KM Laser drilling)
  • Post treatments of CVD-grown colorless diamonds (by HPHT press)
  • ID of HPHT-enhanced diamonds using advanced instruments
  • ID of mounted synthetic diamonds with EXA instrument and screening instruments
  • Problems and solution in identification of melee natural and synthetic diamonds

PRACTICAL: Samples of Ia, IIa, IIb, Ib diamonds (natural and synthetic origin) are tested with UV lamp (“inspectors”), Gempen, microscopes and Polarioscope, Alrosa Diamond Inspector, EXA.

Afternoon (1:45 PM to 5:30 PM): ID of Coloured Diamonds (Natural, Treated, and Lab-grown)

  • YELLOW and ORANGE diamonds: sources/producers, characteristics and ID
  • GREEN and CHAMELEON diamonds: source/producers, characteristics and ID
  • BLUE and GRAY diamonds: sources/producers, characteristics and ID
  • PINK and RED diamonds: sources/producers, characteristics and ID
  • Use of Standard Instruments to separate Coloured Natural and Synthetic Diamonds
  • Color Enhancements – stable (irradiation, annealing, HPHT, multistep treatments)
  • Post treatments of HPHT-grown and CVD-grown diamonds (irradiation and HPHT)
  • Identification methods for treated diamonds with advanced instruments at labs
  • Grading and Certification of coloured diamonds at gem laboratories

PRACTICAL: Coloured Diamonds are tested with portable polarioscope, Gempen, PL Inspector, microscope and handheld spectroscope in screening and ID with EXA machine.