Diamond & Diamond Grading Exam
450+ Actual Exam Questions With Reviewed
100% Correct Detailed Answers
Guaranteed Pass!!
1. Define: alluvial deposit - ANSWER a deposit where gems are eroded
from their source rock, and then transported away from the source and
further concentrated
2. Define: bulk sampling - ANSWER large-scale character sampling
3. Define: character sampling - ANSWER testing for the size, shape, clarity
and color of the diamonds in a deposit
4. Define: cuttable rough - ANSWER diamond rough with good enough
size, shape, clarity and color to produce a polished stone suitable for use in
jewelry
5. Define: gravity sorting - ANSWER separating heavier materials
(diamonds) from a test sample
6. Define: indicator minerals - ANSWER minerals formed together with
diamonds at great depths and brought to the surface by the same kimerlites
or lamproites
,7. Define: industrial rough - ANSWER diamond rough suitable for use in
tools, drills, abrasives and other industrial applications
8. Define: marine deposit - ANSWER secondary diamond deposit carried
by rivers or streams to the ocean floor or shoreline
9. Define: microdiamond testing - ANSWER screening for the presence of
tiny diamonds in a sample
10.Define: ore grading - ANSWER concentration of diamond in a potentially
mineable deposit
11.Define: primary deposit - ANSWER gems found in the rock that carried
them to the surface
12.Define: secondary deposit - ANSWER gems found away from their
primary source
13.Core - ANSWER Earth's innermost layer. (Assignment 4)
14.Covalent bond - ANSWER A chemical bond formed by two atoms
sharing electrons. (Assignment 7)
,15.Craftsmanship - ANSWER The care that goes into the fashioning of a
polished diamond, as confirmed by its finish. (Assignment 15)
16.Cratons - ANSWER Ancient, large, and stable parts of the earth's
continental crust. (Assignment 4)
17.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)
18.Cross worker - ANSWER A person who performs the cross-working
operations during diamond polishing; sometimes called a cross cutter.
(Assignment 9)
19.Cross working - ANSWER 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)
20.Crown angle - ANSWER The angle formed by the bezel facets and the
girdle plane. (Assignment 14)
21.Crown height percentage - ANSWER The distance from the girdle plane
to the table, expressed as a percentage of average girdle diameter.
(Assignment 14)
, 22.Crust - ANSWER The surface and outermost layer of the earth.
(Assignment 4)
23.Crystal - ANSWER Solid matter with atoms arranged in a regular,
repeating pattern. (Assignment 7)
24.Crystal (Xtl) - ANSWER A mineral crystal contained in a diamond.
(Assignment 10)
25.Crystal planes - ANSWER Internal directions parallel to a mineral's unit
cell surfaces. (Assignment 7)
26.Crystal shape (form) - ANSWER Geometric shape of a well-formed
crystal. (Assignment 7)
27.Crystal structure (lattice) - ANSWER Regular, repeating arrangement of
atoms in a mineral. (Assignment 7)
28.Crystal systems - ANSWER Categories of crystals based on their
symmetry and internal structure. (Assignment 7)
29.Crystalline - ANSWER Composed of crystals or related to crystals.
(Assignment 7)
450+ Actual Exam Questions With Reviewed
100% Correct Detailed Answers
Guaranteed Pass!!
1. Define: alluvial deposit - ANSWER a deposit where gems are eroded
from their source rock, and then transported away from the source and
further concentrated
2. Define: bulk sampling - ANSWER large-scale character sampling
3. Define: character sampling - ANSWER testing for the size, shape, clarity
and color of the diamonds in a deposit
4. Define: cuttable rough - ANSWER diamond rough with good enough
size, shape, clarity and color to produce a polished stone suitable for use in
jewelry
5. Define: gravity sorting - ANSWER separating heavier materials
(diamonds) from a test sample
6. Define: indicator minerals - ANSWER minerals formed together with
diamonds at great depths and brought to the surface by the same kimerlites
or lamproites
,7. Define: industrial rough - ANSWER diamond rough suitable for use in
tools, drills, abrasives and other industrial applications
8. Define: marine deposit - ANSWER secondary diamond deposit carried
by rivers or streams to the ocean floor or shoreline
9. Define: microdiamond testing - ANSWER screening for the presence of
tiny diamonds in a sample
10.Define: ore grading - ANSWER concentration of diamond in a potentially
mineable deposit
11.Define: primary deposit - ANSWER gems found in the rock that carried
them to the surface
12.Define: secondary deposit - ANSWER gems found away from their
primary source
13.Core - ANSWER Earth's innermost layer. (Assignment 4)
14.Covalent bond - ANSWER A chemical bond formed by two atoms
sharing electrons. (Assignment 7)
,15.Craftsmanship - ANSWER The care that goes into the fashioning of a
polished diamond, as confirmed by its finish. (Assignment 15)
16.Cratons - ANSWER Ancient, large, and stable parts of the earth's
continental crust. (Assignment 4)
17.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)
18.Cross worker - ANSWER A person who performs the cross-working
operations during diamond polishing; sometimes called a cross cutter.
(Assignment 9)
19.Cross working - ANSWER 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)
20.Crown angle - ANSWER The angle formed by the bezel facets and the
girdle plane. (Assignment 14)
21.Crown height percentage - ANSWER The distance from the girdle plane
to the table, expressed as a percentage of average girdle diameter.
(Assignment 14)
, 22.Crust - ANSWER The surface and outermost layer of the earth.
(Assignment 4)
23.Crystal - ANSWER Solid matter with atoms arranged in a regular,
repeating pattern. (Assignment 7)
24.Crystal (Xtl) - ANSWER A mineral crystal contained in a diamond.
(Assignment 10)
25.Crystal planes - ANSWER Internal directions parallel to a mineral's unit
cell surfaces. (Assignment 7)
26.Crystal shape (form) - ANSWER Geometric shape of a well-formed
crystal. (Assignment 7)
27.Crystal structure (lattice) - ANSWER Regular, repeating arrangement of
atoms in a mineral. (Assignment 7)
28.Crystal systems - ANSWER Categories of crystals based on their
symmetry and internal structure. (Assignment 7)
29.Crystalline - ANSWER Composed of crystals or related to crystals.
(Assignment 7)
