DIAMOND & DIAMOND GRADING EXAM
WITH CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+
Cross working - ANSWERS-Placing the bezel and pavilion
facets on round and fancy shapes. Sometimes combined
with blocking, especially on smaller stones. Also called cross
cutting. (Assignment 9)
Crown angle - ANSWERS-The angle formed by the bezel
facets and the girdle plane. (Assignment 14)
Crown height percentage - ANSWERS-The distance from the
girdle plane to the table, expressed as a percentage of
average girdle diameter. (Assignment 14)
Crust - ANSWERS-The surface and outermost layer of the
earth. (Assignment 4)
,Crystal - ANSWERS-Solid matter with atoms arranged in a
regular, repeating pattern. (Assignment 7)
Crystal (Xtl) - ANSWERS-A mineral crystal contained in a
diamond. (Assignment 10)
Crystal planes - ANSWERS-Internal directions parallel to a
mineral's unit cell surfaces. (Assignment 7)
Crystal shape (form) - ANSWERS-Geometric shape of a well-
formed crystal. (Assignment 7)
Crystal structure (lattice) - ANSWERS-Regular, repeating
arrangement of atoms in a mineral. (Assignment 7)
Crystal systems - ANSWERS-Categories of crystals based on
their symmetry and internal structure. (Assignment 7)
Crystalline - ANSWERS-Composed of crystals or related to
crystals. (Assignment 7)
,Culet size - ANSWERS-The size of the facet at the bottom of
the diamond where the pavilion mains meet. (Assignment
15)
Cuttable rough - ANSWERS-Diamond rough with good
enough size, shape, clarity, and color to produce a polished
stone suitable for use in jewelry. (Assignment 5)
Cutting center - ANSWERS-A city, region, or country with a
large number of gemstone manufacturers. (Assignment 3)
Cutting style - ANSWERS-The arrangement of a gem's facets.
(Assignment 16)
Darkfield illumination - ANSWERS-Lighting of a diamond
from the side against a black, non-reflective background.
(Assignment 10)
Dense media separation - ANSWERS-A recovery process that
separates diamonds from lighter material. Also called heavy
media separation. (Assignment 6)
, Depth of field - ANSWERS-The distance that's clear and
sharp above and below a point you focus on with a
magnifier. (Assignment 10)
Design - ANSWERS-A diamond's physical shape, including its
proportions and durability, determined by decisions made
during the fashioning process. (Assignment 15)
Diamantaire - ANSWERS-A knowledgeable, experienced,
and successful person, usually a dealer or manufacturer, in
the diamond trade. (Assignment 20)
Diamond pipeline - ANSWERS-The path diamonds followed
from the mine to the consumer. (Assignment 2)
Diamond simulant - ANSWERS-Any material that is not
diamond or synthetic diamond, but which imitates a
diamond's appearance and is used in its place. (Assignment
18)
Digger - ANSWERS-An independent diamond prospector.
(Assignment 2)
WITH CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+
Cross working - ANSWERS-Placing the bezel and pavilion
facets on round and fancy shapes. Sometimes combined
with blocking, especially on smaller stones. Also called cross
cutting. (Assignment 9)
Crown angle - ANSWERS-The angle formed by the bezel
facets and the girdle plane. (Assignment 14)
Crown height percentage - ANSWERS-The distance from the
girdle plane to the table, expressed as a percentage of
average girdle diameter. (Assignment 14)
Crust - ANSWERS-The surface and outermost layer of the
earth. (Assignment 4)
,Crystal - ANSWERS-Solid matter with atoms arranged in a
regular, repeating pattern. (Assignment 7)
Crystal (Xtl) - ANSWERS-A mineral crystal contained in a
diamond. (Assignment 10)
Crystal planes - ANSWERS-Internal directions parallel to a
mineral's unit cell surfaces. (Assignment 7)
Crystal shape (form) - ANSWERS-Geometric shape of a well-
formed crystal. (Assignment 7)
Crystal structure (lattice) - ANSWERS-Regular, repeating
arrangement of atoms in a mineral. (Assignment 7)
Crystal systems - ANSWERS-Categories of crystals based on
their symmetry and internal structure. (Assignment 7)
Crystalline - ANSWERS-Composed of crystals or related to
crystals. (Assignment 7)
,Culet size - ANSWERS-The size of the facet at the bottom of
the diamond where the pavilion mains meet. (Assignment
15)
Cuttable rough - ANSWERS-Diamond rough with good
enough size, shape, clarity, and color to produce a polished
stone suitable for use in jewelry. (Assignment 5)
Cutting center - ANSWERS-A city, region, or country with a
large number of gemstone manufacturers. (Assignment 3)
Cutting style - ANSWERS-The arrangement of a gem's facets.
(Assignment 16)
Darkfield illumination - ANSWERS-Lighting of a diamond
from the side against a black, non-reflective background.
(Assignment 10)
Dense media separation - ANSWERS-A recovery process that
separates diamonds from lighter material. Also called heavy
media separation. (Assignment 6)
, Depth of field - ANSWERS-The distance that's clear and
sharp above and below a point you focus on with a
magnifier. (Assignment 10)
Design - ANSWERS-A diamond's physical shape, including its
proportions and durability, determined by decisions made
during the fashioning process. (Assignment 15)
Diamantaire - ANSWERS-A knowledgeable, experienced,
and successful person, usually a dealer or manufacturer, in
the diamond trade. (Assignment 20)
Diamond pipeline - ANSWERS-The path diamonds followed
from the mine to the consumer. (Assignment 2)
Diamond simulant - ANSWERS-Any material that is not
diamond or synthetic diamond, but which imitates a
diamond's appearance and is used in its place. (Assignment
18)
Digger - ANSWERS-An independent diamond prospector.
(Assignment 2)
