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

• Color Grading Diamonds
• Color Grading Fancy Colored Diamonds
• Cut Grading Diamonds Part 1: Traditional Methods
• Cut Grading Diamonds Part 2: Modern Methods
• Using a Reticle

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.