DIAMOND & DIAMOND GRADING 2026 EXAM
QUESTIONS WITH COMPLETE SOLUTIONS
GUARANTEED PASS
Brillianteering -ANSWER - >Placement and polishing of
the star and upper and lower girdle facets. (Assignment
9)
Bruise (Br) -ANSWER - >A tiny area of impact
accompanied by very small, root-like feathers visible at
10X magnification; typically occurs at a facet junction.
(Assignment 10)
Bruting -ANSWER - >Forming the basic face-up outline of
a diamond to prepare it for faceting. (Assignment 9)
Bulk sampling -ANSWER - >Large-scale character
sampling. (Assignment 5)
Burn Marks (Brn) -ANSWER - >Hazy surface areas that
result from excessive heat or from uneven polishing
caused by structural irregularities; also called polish
marks or burned facets. (Assignment 10)
Cavity (Cv) -ANSWER - >An angular opening created
when part of a feather breaks away. (Assignment 10)
,Central Selling Organisation (CSO) -ANSWER - >An agency
designed to purchase, sort, evaluate, and sell rough
diamonds. (Assignment 2)
Character sampling -ANSWER - >Testing for the size,
shape, clarity, and color of the diamonds in a deposit.
(Assignment 5)
Characteristic color -ANSWER - >The basic color of a
fancy-colored diamond. (Assignment 13)
Chemical vapor deposition (CVD) -ANSWER - >An
industrial process adapted to allow growth of synthetic
diamond from carbon-rich gas in thin layers onto a silicon
or diamond surface. (Assignment 19)
Chip (Ch) -ANSWER - >A shallow opening caused by
damage to the stone's surface; typically occurs at a girdle
edge, facet junction, or culet. (Assignment 10)
Clarity characteristic -ANSWER - >Internal or external
feature of a gemstone that helps determine its quality
and establish its identity. (Assignment 10)
,Cleavage (Cl) -ANSWER - >Large, severe, straight break
along a plane of atomic weakness; considered an
inclusion. (Assignment 10)
Cleavage plane -ANSWER - >Plane parallel to a possible
crystal face, where a diamond can split cleanly when
struck. (Assignment 7)
Cleaver -ANSWER - >A person who cleaves, or splits, a
diamond along a cleavage plane. The cleaver might also
be responsible for planning the fashioning of a polished
gem. (Assignment 9)
Cleaving -ANSWER - >Dividing a diamond into two or
more pieces along a cleavage plane. (Assignment 9)
Cloud (Cld) -ANSWER - >Many tightly grouped pinpoints
that might be too small to distinguish individually at 10X
but together have a hazy appearance. (Assignment 10)
Color center -ANSWER - >Structural defect that
influences an object's absorption of light and can cause
its color. (Assignment 12)
Conflict diamonds -ANSWER - >Diamonds used to finance
violence and terror. (Assignment 3)
, Consignment -ANSWER - >A selection of goods loaned to
a dealer by another wholesaler or manufacturer.
(Assignment 20)
Core -ANSWER - >Earth's innermost layer. (Assignment 4)
Covalent bond -ANSWER - >A chemical bond formed by
two atoms sharing electrons. (Assignment 7)
Craftsmanship -ANSWER - >The care that goes into the
fashioning of a polished diamond, as confirmed by its
finish. (Assignment 15)
Cratons -ANSWER - >Ancient, large, and stable parts of
the earth's continental crust. (Assignment 4)
Critical angle -ANSWER - >Angle between the normal and
the maximum angle of refraction, which is the largest
angle at which rays inside the diamond can escape.
(Assignment 8)
Cross worker -ANSWER - >A person who performs the
cross-working operations during diamond polishing;
sometimes called a cross cutter. (Assignment 9)
QUESTIONS WITH COMPLETE SOLUTIONS
GUARANTEED PASS
Brillianteering -ANSWER - >Placement and polishing of
the star and upper and lower girdle facets. (Assignment
9)
Bruise (Br) -ANSWER - >A tiny area of impact
accompanied by very small, root-like feathers visible at
10X magnification; typically occurs at a facet junction.
(Assignment 10)
Bruting -ANSWER - >Forming the basic face-up outline of
a diamond to prepare it for faceting. (Assignment 9)
Bulk sampling -ANSWER - >Large-scale character
sampling. (Assignment 5)
Burn Marks (Brn) -ANSWER - >Hazy surface areas that
result from excessive heat or from uneven polishing
caused by structural irregularities; also called polish
marks or burned facets. (Assignment 10)
Cavity (Cv) -ANSWER - >An angular opening created
when part of a feather breaks away. (Assignment 10)
,Central Selling Organisation (CSO) -ANSWER - >An agency
designed to purchase, sort, evaluate, and sell rough
diamonds. (Assignment 2)
Character sampling -ANSWER - >Testing for the size,
shape, clarity, and color of the diamonds in a deposit.
(Assignment 5)
Characteristic color -ANSWER - >The basic color of a
fancy-colored diamond. (Assignment 13)
Chemical vapor deposition (CVD) -ANSWER - >An
industrial process adapted to allow growth of synthetic
diamond from carbon-rich gas in thin layers onto a silicon
or diamond surface. (Assignment 19)
Chip (Ch) -ANSWER - >A shallow opening caused by
damage to the stone's surface; typically occurs at a girdle
edge, facet junction, or culet. (Assignment 10)
Clarity characteristic -ANSWER - >Internal or external
feature of a gemstone that helps determine its quality
and establish its identity. (Assignment 10)
,Cleavage (Cl) -ANSWER - >Large, severe, straight break
along a plane of atomic weakness; considered an
inclusion. (Assignment 10)
Cleavage plane -ANSWER - >Plane parallel to a possible
crystal face, where a diamond can split cleanly when
struck. (Assignment 7)
Cleaver -ANSWER - >A person who cleaves, or splits, a
diamond along a cleavage plane. The cleaver might also
be responsible for planning the fashioning of a polished
gem. (Assignment 9)
Cleaving -ANSWER - >Dividing a diamond into two or
more pieces along a cleavage plane. (Assignment 9)
Cloud (Cld) -ANSWER - >Many tightly grouped pinpoints
that might be too small to distinguish individually at 10X
but together have a hazy appearance. (Assignment 10)
Color center -ANSWER - >Structural defect that
influences an object's absorption of light and can cause
its color. (Assignment 12)
Conflict diamonds -ANSWER - >Diamonds used to finance
violence and terror. (Assignment 3)
, Consignment -ANSWER - >A selection of goods loaned to
a dealer by another wholesaler or manufacturer.
(Assignment 20)
Core -ANSWER - >Earth's innermost layer. (Assignment 4)
Covalent bond -ANSWER - >A chemical bond formed by
two atoms sharing electrons. (Assignment 7)
Craftsmanship -ANSWER - >The care that goes into the
fashioning of a polished diamond, as confirmed by its
finish. (Assignment 15)
Cratons -ANSWER - >Ancient, large, and stable parts of
the earth's continental crust. (Assignment 4)
Critical angle -ANSWER - >Angle between the normal and
the maximum angle of refraction, which is the largest
angle at which rays inside the diamond can escape.
(Assignment 8)
Cross worker -ANSWER - >A person who performs the
cross-working operations during diamond polishing;
sometimes called a cross cutter. (Assignment 9)
