What is the deeper test before mining operations called (mini mining)?

• A. Open pit
• B. Drift
• C. Shaft
• D. Bulk sample

Answer: (D)

Bulk sampling is the deeper test before mining because it provides a practical, large-scale check of what the ore will actually yield when you mine and process it. By extracting a representative, sizable portion of ore from the deposit, you can measure grade (carats per tonne), diamond content, and how well the processing plant will recover diamonds. This data helps validate the resource model, confirm continuity of the ore body, and assess economics—everything you need to decide whether full-scale mining makes sense.

The other terms describe ways to extract or access ore, not a testing step. Open pit refers to surface mining, while drift and shaft are underground access methods. They are part of mining methods, not the preliminary evaluation phase.