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

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

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

Answer: (A)

A kerf is the notch carved into rough to guide and initiate cleavage. By scoring a narrow line along the stone, the cutter creates a controlled stress point that directs the fracture along the diamond’s natural cleavage plane. This makes the break cleaner and safer than trying to snap the rough arbitrarily. The other terms refer to different things. Rose Cut and Old Mine Cut are historical diamond face-up shapes rather than preparatory steps. Planner isn’t a term used for rough preparation in diamond cutting.

A kerf is the notch carved into rough to guide and initiate cleavage. By scoring a narrow line along the stone, the cutter creates a controlled stress point that directs the fracture along the diamond’s natural cleavage plane. This makes the break cleaner and safer than trying to snap the rough arbitrarily.

The other terms refer to different things. Rose Cut and Old Mine Cut are historical diamond face-up shapes rather than preparatory steps. Planner isn’t a term used for rough preparation in diamond cutting.