A professional who operates jewel-opening machine to smooth and polish jewel holes to size. Responsibilities include:

• Mounts wire, on which jewels are strung, in machine, pulls wire taut, and forces sleevelike devices against each end of jewel row to force jewels tightly together.
• Brushes shellac over jewels and allows them to harden.
• Starts belt which causes row of jewels to rotate around wire.
• Pulls diamond-dusted tapered wire back and forth through rotating jewels to enlarge and polish holes.
• Pulls thicker portion of wire into working position until hole reaches specified diameter.
• Verifies size of hole on graduated tapered needle.
• Works to tolerances of 0.0001 inch.