What percentage of natural diamonds are certified by the Kimberley Process?

• A. 99.98%.
• B. 100%.
• C. 50%.
• D. 75%.

Answer: (A)

The Kimberley Process Certification Scheme is designed to prevent conflict diamonds from entering the market by requiring certificates for rough-diamond shipments between participating countries. Because almost all legal rough-diamond trade is covered, the certification rate is extremely high, though not perfect. In practice, estimates place it around 99.8% to 99.9% of natural rough diamonds being Kimberley Process certified; 99.98% is the closest figure among the options and communicates that near-total coverage. It’s not 100% because a small portion of trade occurs outside the scheme or through informal channels. Note that the process specifically addresses rough diamonds, not polished stones.