What is the practical purpose of diamond rough mapping in modern planning?

• A. To identify the best rough to cut based on potential yield
• B. To grade the stone's color
• C. To measure cut grade
• D. To estimate global market demand

Answer: (A)

Rough mapping is about predicting how much value a piece of rough can yield when it’s cut, by planning the most efficient orientation and sawing approach to preserve and maximize high-value portions. By assessing the rough’s shape, weight distribution, and internal features, planners estimate potential outcomes such as how many gem-quality stones can be produced, their sizes, and the likely color and clarity range after cutting. This enables selecting the rough that offers the best return on investment, balancing potential carat weight with quality and market value, while reducing waste. Color grading is done on finished stones, cut grades are determined after shaping and polishing, and global market demand is not decided by rough mapping alone, making those options less relevant to the practical purpose of rough mapping.