In the world of gemstones: Mastering the art of diamond identification

The gemstone industry is increasingly challenged by the growing presence of very convincing synthetic diamonds, whose differentiation from natural diamonds has become a real scientific art. Although they are almost identical on the outside, the differences between them are crucial—both in terms of value and ethics.

This one-day master class is aimed at anyone involved in making jewelry, selling, or investing in gemstones who wants to deepen their knowledge and acquire practical diamond identification skills.

Participants will:

• Learn the basic differences between natural diamonds, synthetic diamonds, and simulants
• Gain an insight into the technologies used to produce laboratory-grown diamonds (HPHT, CVD).
• Learn how to identify different types of stones using basic gemological tools.
• Understand how the different types of diamonds affect the market, the valuation of jewelry, and the natural environment

Workshop Program

Morning—Theoretical Session

• Introduction to the world of diamonds: origin, types, ethical dilemmas, and the market
• Natural diamonds: how they are formed, their properties, and how they are mined
• Synthetic diamonds: technologies (HPHT, CVD), properties, and market influence
• Simulants: what they are and how to distinguish them from real diamonds
• Overview of the most important gemological instruments
  
  Lunch break

Afternoon—Practical Session

• Practical work with microscopes and other equipment
• Comparative analysis of natural, synthetic, and simulated diamond samples
• Explanation of typical inclusions and optical markers for identification
• Identification exercises led by experts

Workshop Instructors

Branko Deljanin—internationally recognized gemologist and one of the world’s leading experts in the identification of natural, treated, and synthetic diamonds as well as colored stones. He is a gemologist certified by the GIA (Gemological Institute of America) and Gem-A (The Gemmological Association of Great Britain).

Branko has participated in numerous global research projects, collaborated with gemological laboratories, and trained professionals around the world. As an author and frequent speaker at international conferences, his expertise lies in the practical application of both classical and advanced testing methods.

Peter Dragolič – Master goldsmith and gemstone expert. Peter began his career as a jewelry designer and goldsmith, combining technical precision with artistic expression. His passion for gemstones led him to study abroad and gain expertise in gemology and gem cutting. By combining traditional craftsmanship with modern gemological methods, he brings rare techniques and knowledge to the Slovenian market. His commitment to education and precision enables him to pass on his expertise to both professionals and enthusiasts.

Why Should You Participate?

• Acquire immediately applicable knowledge and skills
• Learn to avoid the most common pitfalls when buying and selling diamonds
• Gain hands-on experience with basic identification tools
• Improve your expertise and credibility in the jewelry and gemstone industry

Who Should Attend?

• Jewelers and jewelry manufacturers
• Gemstone dealers and brokers