Sizing in the diamond recovery process is accomplished through a series of which actions?

• A. Grinding and washing
• B. Sorting and screening
• C. Crushing and scrubbing
• D. Melting and casting

Answer: (C)

Sizing means reducing the ore to a size where diamonds can be liberated from the rock and handled more easily in later steps. This is achieved by breaking large pieces into smaller ones (crushing) and then cleaning off surface matter like clay and fines so diamonds are freed from the surrounding material (scrubbing). Together, these actions prepare the material for subsequent size classification, such as screening. Other options involve activities like grinding, washing alone, sorting/classifying, or melting and casting, which don't specifically describe the size reduction and surface cleaning that sizing requires.