Professor Sugianto, geologist from the University of Indonesia will conduct the classroom training.

• An Introduction to Gemstone Grading
• Carats, Karats and Carrots
• Evaluating the Cut
• Grading Set Stones
• Recutting Diamonds and Colored Stones
• Grading Gem Carvings

DGL uses the "Flipped" classroom instructional methodology. This type of learning has the student study the IGS online instructional content prior to the class. In-class lessons are then used more to discuss, answer questions, have live demonstrations, hands-on training  and in other ways to engage students in the syllabus content.

Classes are taught in Bahasa Indonesia.