What does the certification stage in the diamond supply chain involve?

• A. Cutting and polishing of stones.
• B. Independent verification of grading and origin documentation.
• C. Marketing and advertising.
• D. Mining extraction.

Answer: (B)

The certification stage is about independent verification of the diamond’s grade and origin documentation. A trusted gemological laboratory reviews the stone’s characteristics—carat weight, color, clarity, and cut quality—and checks that the grading report accurately describes the stone. They may also verify provenance information and ensure the origin documentation supports ethical sourcing claims. This creates a reliable, verifiable record for buyers, distinguishing the diamond from others and helping confirm its value and provenance.