9 Key Terms Flashcards
Blocking
Placing the first 17 or 18 facets on a diamond.
Brillianteering
Placement and polishing of the star and upper and lower half facets.
Bruting
Forming the basic face-up outline of a round or rounded-shape diamond to prepare it for faceting.
Cleaving
Dividing a diamond into two or more pieces along a cleavage plane.
Dop
A holder that secures a diamond during sawing, bruting, or polishing.
Kerf
A notch scratched into diamond rough to prepare it for cleaving.
Old European cut
An early brilliant cut with a circular girdle.
Old-mine cut
An early cushion shaped brilliant with a high crown, deep pavilion, and 58 facets including a large culet.
Planner
The person who decides where to mark diamond rough for fashioning into the most profitable
polished gem.
Polishing
Placing and finishing facets on a rough diamond. Also called faceting.
Sawing
Dividing diamond rough into sections, either mechanically or by laser.
Scaife
A rapidly spinning horizontal disc coated with diamond powder, used to polish diamond rough.
Single cut
A simple diamond cut, with a table, eight crown facets, eight pavilion facets, and sometimes a culet.
Tang
A device that holds the dop and allows polishers to adjust and maintain a diamond’s angle during polishing.
