In the diamond processing sequence, which stage comes after the grease belt?

• A. Screening
• B. Concentrating
• C. Sizing
• D. Recovery

Answer: (D)

The key idea is how a diamond processing line moves from one separation method to the next. A grease belt uses a sticky surface to capture diamonds while waste material passes on. The immediate job after diamonds have attached to the grease belt is to retrieve them from that belt—the recovery step. This is where the diamonds are washed off or scraped from the grease, collected, and prepared for the rest of the process. Only after this recovery stage do you move on to concentrating, which increases diamond content by removing more of the surrounding material, and then sizing, which classifies the diamonds by size for the final product. Screening and sizing occur at different points in the flow, with screening typically used earlier to separate material by size before the grease-based separation, and sizing coming later after concentration to meet product specifications.