Which segment has the most risk and unpredictability in the diamond value chain?

• A. Mining
• B. Sorting
• C. Cutting
• D. Polishing

Answer: (A)

Mining carries the greatest risk and unpredictability because it starts from a highly uncertain subsurface reality: where rich deposits exist, how much ore is truly valuable, and what it will cost to extract it. The grade of ore can vary dramatically within and between deposits, so forecasted yields are unpredictable. The geometry and extent of the ore body are unknown until extensive exploration and mining work is done, and the operation itself is capital-intensive, logistically complex, and time-consuming. Additionally, mining faces political and regulatory risks, licensing hurdles, labor and security concerns, and environmental and community issues, all of which can shift plans, costs, and timelines dramatically. These factors combine to create far more variability in supply, timing, and investment risk than downstream steps, where sorting, cutting, and polishing work from established inputs and follow more standardized processes with clearer cost structures.