Which term is a notch scratched into rough diamond to prepare it for cleaving?

Which term is a notch scratched into rough diamond to prepare it for cleaving?

• A. Kerf
• B. Old European Cut
• C. Planner
• D. Rose Cut

Answer: (A)

This tests understanding of how rough diamonds are split for cutting. A kerf is a shallow groove or notch scratched into the surface of the rough diamond to establish a cleavage plane. Diamonds fracture most cleanly along natural crystal planes, so the kerf marks a controlled path where a blow will split the stone along that plane, minimizing waste and ensuring a predictable break. The other terms refer to finished diamond cut styles or unrelated terminology, not to a preparatory notch for cleavage.

This tests understanding of how rough diamonds are split for cutting. A kerf is a shallow groove or notch scratched into the surface of the rough diamond to establish a cleavage plane. Diamonds fracture most cleanly along natural crystal planes, so the kerf marks a controlled path where a blow will split the stone along that plane, minimizing waste and ensuring a predictable break. The other terms refer to finished diamond cut styles or unrelated terminology, not to a preparatory notch for cleavage.