Advanced Gemmology Education Programmes Offered by Gemological Headquarters International Advanced Gemology - Coloured Gemstones (1 Day)

Instructor: BRANKO DELJANIN, B.Sc., GG, FGA, DUG, Project Manager, GHI Research and Education

Morning

• Cause of Colour in Gemstones
• Corundum Treatments
• Detection of Heat Treatments of Ruby and Sapphire
• Sapphires from around the World
• Heat Treatments with Chemical Elements
• Fracture-filled Corundum
• Effect of Heat Treatments on Inclusions
• Use of Advanced Instruments in Detection of Treatments and Synthetics

The Programme also includes a Practical Lab with Ruby and Sapphire Samples.

Afternoon

• World Emerald Localities
• Flux and Hydrothermal Synthetic Emeralds
• Emerald enhancement
• Identification of fracture filled emeralds
• Quality of Jade
• A, B and C Treated Jadeite Jade
• Identification of dyed Jade with microscopy

• Identification of polymer impregnated Jade by FTIR spectroscopy

The Programme also includes a Practical Lab with Emerald and Jade Samples.

Laboratory- Grown Diamonds (1 Day)

Instructor: BRANKO DELJANIN, B.Sc., DGA, FGA, DUG, GHI Research

Topics Covered

• Morphology and Source of Natural Diamonds
• External and internal characteristics of Natural Diamonds
• What are Chameleon Diamonds?
• Causes of Colour in Natural and Lab-grown Diamonds
• Diamond (natural and lab-grown) Types
• HPHT ((High Pressure High Temperature) Technology of Growing Diamonds
• CVD (Chemical Vapour Deposition) Technology of Growing Diamonds
• Colour Treatments of Lab-grown Diamonds
• Testing and Identification of Lab-grown Diamonds (CISystem)
• Standard Gemmological Methods (microscopy, CPF, UV)
• Advanced Gemmological Methods (spectroscopy, chemistry)
• Producers and Marketing of Gem-quality Lab-grown Diamonds
• Grading and Certification of Lab-grown Diamonds at GHI Labs

The Programme also includes a Practical Workshop with Lab-grown Diamonds.

Treatments of Diamonds (1 Day)

Instructor: DUSAN SIMIC, B.Sc., FGG, SGC, Manager, GHI India

Topics Covered
Clarity Modifications

• Fracture Filling and Stability
• Laser Drilling (traditional and KM internal) and Stability

Colour Modifications

• Coating (old and new technique) and Stability
• Irradiation and Stability
• Annealing and Stability
• High Pressure High Temperature (HPHT) and Stability
• Combination Treatments and Stability

Testing and Identification of Treated Diamonds (CI System)

• Standard Gemmological Methods (microscopy, CPF, UV)
• Advanced Gemmological Methods (spectroscopy, chemistry)

Grading and Certification of Treated Diamonds at GHI Labs

The Programme also includes a Practical Workshop with Treated Diamonds