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

• Evaluating Color, Hue, Tone, and Saturation
• Clarity Grading for Colored Stones
• Distinguishing Diamonds
• Clarity Grading Diamonds

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.