Diamond & Diamond Grading Exam
QUESTIONS WITH CORRECT
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Define: drift - ANSWER ✓ a horizontal tunnel drilled through a diamond pipe
Define: grease belt - ANSWER ✓ an appartus that uses diamonds affinity for
grease to separate them from other minerals
Define: near-gem - ANSWER ✓ diamond rough whose color and carity is such
that it can be either polished or used industrially, depending on market conditions
Define: open-pit mining - ANSWER ✓ removal of mineral-bearing ore from a
large surface excavation
Define: overburden - ANSWER ✓ sand, gravel, or rock that covers a diamond
pipe. must be removed to reach diamond bearing ore
Define: primary crushing - ANSWER ✓ reduction of newly mined ore to a
manageable size
Define: recovery - ANSWER ✓ a method used to separate diamonds from ore or
alluvial sediments
Define: scrubber - ANSWER ✓ an apparatus that washes away dirt and clay from
diamond-bearing ore
Define: x-ray separation - ANSWER ✓ a recovery method that uses x-rays to
detect diamonds and an air jet to remove them from ore
Russia's significant deposits are in... - ANSWER ✓ Siberia
,Most diamonds from Australia are... - ANSWER ✓ small and poor in quality
African diamonds are recovered from... - ANSWER ✓ alluvial, pipe and marine
deposites
The largest percentage of world diamond production (by weight) is mined in... -
ANSWER ✓ Australia
Chambering and block caving are methods used in... - ANSWER ✓ mining
diamond pipes
Removal of mineral-bearing ore from a surface excavation is called... - ANSWER
✓ open-pit mining
T/F: Covalent bonds are the strongest of all atomic bonds - ANSWER ✓ TRUE
Diamonds atoms are more closely bonded than the atoms of... - ANSWER ✓ any
other natural material
the most common habit of the gem diamond is.... - ANSWER ✓ the octahedron
perfectly shaped octahedron rough is... - ANSWER ✓ rare
Diamonds belong to which crystal system? - ANSWER ✓ Isometric or cubic
crystal system...the most symmetrical system
T/F: Shape is the most important factor in a rough gem diamonds crystal's
potential value - ANSWER ✓ TRUE
What is the most common twinned diamond crystal? - ANSWER ✓ The macle
What factors influence a rough diamonds potential as a faceted gem? - ANSWER
✓ Shape, clarity and color
Which planes are the most important to a diamond cutter? - ANSWER ✓ The
cubic, octahedral and the dodecahedral
, agrregate - ANSWER ✓ a solid mass of individial, randomly oriented crystals,
intergrown or held together by a natural bind agent
clevage plane - ANSWER ✓ plane parallel to a possible crystal face; where a
diamond can split cleanly when struck
crystal - ANSWER ✓ solid matter with atoms arranged in regular, repeating
pattern
crystaline - ANSWER ✓ composed of crystals or related to crystals
crystal planes - ANSWER ✓ internal directions parallel to a minerals unit cell
surfaces
crystal shape - ANSWER ✓ geometric shape of a well formed crystal
crystal strucutre - ANSWER ✓ regular, repeating arrangement of atoms in a
mineral
crystal systems - ANSWER ✓ categories of crystals based on their symmetry and
internal structure
doubling - ANSWER ✓ the appearance of double images of a gemstones facet
junctions on the side opposite the viewer
doubly refractive - ANSWER ✓ (antisotropic)- possessing different physical or
optical properties in different crystal directions
glassie - ANSWER ✓ a well shaped, transparent, octahedral diamond crystal with
sharp, square edges
glide plane - ANSWER ✓ crystal distortion caused during growth when one part
of the lattice if offset in relation to the rest
graining (grain lines) - ANSWER ✓ visible shadow like lines in a diamond caused
by irregularities in the crystal structure
habit - ANSWER ✓ characteristic crystal shape of a specific material
, macle - ANSWER ✓ a flat, triangular twinned diamond crystal
singly refractive(isotropic) - ANSWER ✓ possessing the same physical or optical
properties in all crystal directions
specific gravity - ANSWER ✓ ratio of the weight of a material to that of an equal
volume of water
tetrahedron - ANSWER ✓ in diamond, a group of five carbon atoms with one at
the center
thermal conductivity - ANSWER ✓ the relative ability of a material to transfer
heat
thermal expansion - ANSWER ✓ capcity of a material to expand when its heated
trace elements - ANSWER ✓ atoms in a gem that arent part of its essential
chemical composition
twinned crystal - ANSWER ✓ crystal distorted during growth, with two or more
intergrown crystals with opposing crystal directions
unit cell - ANSWER ✓ smallest group of atoms with the characteristic chemical
composition and the basic crystal structure of a mineral
the crystal places most suitable for cleaving a diamond are the... - ANSWER ✓
octahedral planes
squares or rectangles, trigons and parallel groves are types of... - ANSWER ✓
growth marks
which is the softest crystal direction in a diamond? - ANSWER ✓ dodecahedral
crystal shape is an important factor in the evaluation of rough because... -
ANSWER ✓ it affects the amount of weight retained after cutting
the habit of a gem quality diamond is the... - ANSWER ✓ octahedron
QUESTIONS WITH CORRECT
SOLUTIONS||A+ GRADED!!||100%
GUARANTEED PASS||<<Newest
Version>>
Define: drift - ANSWER ✓ a horizontal tunnel drilled through a diamond pipe
Define: grease belt - ANSWER ✓ an appartus that uses diamonds affinity for
grease to separate them from other minerals
Define: near-gem - ANSWER ✓ diamond rough whose color and carity is such
that it can be either polished or used industrially, depending on market conditions
Define: open-pit mining - ANSWER ✓ removal of mineral-bearing ore from a
large surface excavation
Define: overburden - ANSWER ✓ sand, gravel, or rock that covers a diamond
pipe. must be removed to reach diamond bearing ore
Define: primary crushing - ANSWER ✓ reduction of newly mined ore to a
manageable size
Define: recovery - ANSWER ✓ a method used to separate diamonds from ore or
alluvial sediments
Define: scrubber - ANSWER ✓ an apparatus that washes away dirt and clay from
diamond-bearing ore
Define: x-ray separation - ANSWER ✓ a recovery method that uses x-rays to
detect diamonds and an air jet to remove them from ore
Russia's significant deposits are in... - ANSWER ✓ Siberia
,Most diamonds from Australia are... - ANSWER ✓ small and poor in quality
African diamonds are recovered from... - ANSWER ✓ alluvial, pipe and marine
deposites
The largest percentage of world diamond production (by weight) is mined in... -
ANSWER ✓ Australia
Chambering and block caving are methods used in... - ANSWER ✓ mining
diamond pipes
Removal of mineral-bearing ore from a surface excavation is called... - ANSWER
✓ open-pit mining
T/F: Covalent bonds are the strongest of all atomic bonds - ANSWER ✓ TRUE
Diamonds atoms are more closely bonded than the atoms of... - ANSWER ✓ any
other natural material
the most common habit of the gem diamond is.... - ANSWER ✓ the octahedron
perfectly shaped octahedron rough is... - ANSWER ✓ rare
Diamonds belong to which crystal system? - ANSWER ✓ Isometric or cubic
crystal system...the most symmetrical system
T/F: Shape is the most important factor in a rough gem diamonds crystal's
potential value - ANSWER ✓ TRUE
What is the most common twinned diamond crystal? - ANSWER ✓ The macle
What factors influence a rough diamonds potential as a faceted gem? - ANSWER
✓ Shape, clarity and color
Which planes are the most important to a diamond cutter? - ANSWER ✓ The
cubic, octahedral and the dodecahedral
, agrregate - ANSWER ✓ a solid mass of individial, randomly oriented crystals,
intergrown or held together by a natural bind agent
clevage plane - ANSWER ✓ plane parallel to a possible crystal face; where a
diamond can split cleanly when struck
crystal - ANSWER ✓ solid matter with atoms arranged in regular, repeating
pattern
crystaline - ANSWER ✓ composed of crystals or related to crystals
crystal planes - ANSWER ✓ internal directions parallel to a minerals unit cell
surfaces
crystal shape - ANSWER ✓ geometric shape of a well formed crystal
crystal strucutre - ANSWER ✓ regular, repeating arrangement of atoms in a
mineral
crystal systems - ANSWER ✓ categories of crystals based on their symmetry and
internal structure
doubling - ANSWER ✓ the appearance of double images of a gemstones facet
junctions on the side opposite the viewer
doubly refractive - ANSWER ✓ (antisotropic)- possessing different physical or
optical properties in different crystal directions
glassie - ANSWER ✓ a well shaped, transparent, octahedral diamond crystal with
sharp, square edges
glide plane - ANSWER ✓ crystal distortion caused during growth when one part
of the lattice if offset in relation to the rest
graining (grain lines) - ANSWER ✓ visible shadow like lines in a diamond caused
by irregularities in the crystal structure
habit - ANSWER ✓ characteristic crystal shape of a specific material
, macle - ANSWER ✓ a flat, triangular twinned diamond crystal
singly refractive(isotropic) - ANSWER ✓ possessing the same physical or optical
properties in all crystal directions
specific gravity - ANSWER ✓ ratio of the weight of a material to that of an equal
volume of water
tetrahedron - ANSWER ✓ in diamond, a group of five carbon atoms with one at
the center
thermal conductivity - ANSWER ✓ the relative ability of a material to transfer
heat
thermal expansion - ANSWER ✓ capcity of a material to expand when its heated
trace elements - ANSWER ✓ atoms in a gem that arent part of its essential
chemical composition
twinned crystal - ANSWER ✓ crystal distorted during growth, with two or more
intergrown crystals with opposing crystal directions
unit cell - ANSWER ✓ smallest group of atoms with the characteristic chemical
composition and the basic crystal structure of a mineral
the crystal places most suitable for cleaving a diamond are the... - ANSWER ✓
octahedral planes
squares or rectangles, trigons and parallel groves are types of... - ANSWER ✓
growth marks
which is the softest crystal direction in a diamond? - ANSWER ✓ dodecahedral
crystal shape is an important factor in the evaluation of rough because... -
ANSWER ✓ it affects the amount of weight retained after cutting
the habit of a gem quality diamond is the... - ANSWER ✓ octahedron
