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GIA Diamonds and Diamond Grading Final Exam ||Just Out!!!
Most of the diamonds that come from Africa are recovered
from _______ deposits - ANSWER-Pipe, alluvial, and marine
deposits
Most of the diamonds that come from Russia are recovered
from ______ sources. - ANSWER-Primary sources
What is the specific gravity of a gem-quality diamond? -
ANSWER-3.52
Diamonds are more concentrated in which type of deposit? -
ANSWER-Marine deposits
The first step in exploring for diamonds is to _____ - ANSWER-
Look for the oldest parts of the earths crust
The diamond industry has changed dramatically in recent years
because _____ - ANSWER-The world's supply of diamond rough
has increased (more diamonds are available to people)
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The Argyle mind in Australia contributed to the rise of the
cutting industry in _____ - ANSWER-India
What is the softest crystal direction in diamond? - ANSWER-
Dodecahedral
What crystal structure does diamond belong to? - ANSWER-
Isometric or cubic crystal structure
What are diamond's 3 internal crystal planes? - ANSWER-Cubic
(runs horizontal), octahedral (on face), dodecahedral (runs
vertical)
The crystal planes most suitable for cleaving a diamond are the
_______ planes? - ANSWER-Octahedral planes
Another name for the cubic system - ANSWER-Isometric
Polishes the crown and pavilion mains - ANSWER-Blocker
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Polishing of the star and upper and lower half facets - ANSWER-
Brillianteering
Bezel facets are the ones shaped like ____ - ANSWER-Kites
Star facets are the ones shaped like _____ next to the table -
ANSWER-Triangles
Upper half facets are the ones on the ______ next to the girdle
- ANSWER-Outer edge
Visible light is a form of - ANSWER-Radiant energy
Grease on the pavilion of a diamond results in - ANSWER-More
light leakage through the pavilion
The rotary saw contributed to the diamond cutting industry by -
ANSWER-Allowing for greater weight retention from rough
A surface indentation with tiny, root-like feathers penetrating
the stone is called a _____ - ANSWER-Bruise
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A stone with only a few extra facets on its pavilion that can't be
seen face-up should be graded _____ - ANSWER-Flawless
Diamonds with minute inclusions that range from difficult to
very difficult to see under 10x are classified as - ANSWER-VVS1
or VVS2
Blemish; A small opening that looks like a tiny white dot at 10x -
ANSWER-Pit
An included diamond crustal that extends to the surface after
fashioning - ANSWER-Know
A long, thin crystal that looks like a tiny rod at 10x - ANSWER-
Needle
A very small included crystal that looks like a tiny dot at 10x -
ANSWER-Pinpoint
Many tightly grouped pinpoints - ANSWER-Cloud
GIA Diamonds and Diamond Grading Final Exam ||Just Out!!!
Most of the diamonds that come from Africa are recovered
from _______ deposits - ANSWER-Pipe, alluvial, and marine
deposits
Most of the diamonds that come from Russia are recovered
from ______ sources. - ANSWER-Primary sources
What is the specific gravity of a gem-quality diamond? -
ANSWER-3.52
Diamonds are more concentrated in which type of deposit? -
ANSWER-Marine deposits
The first step in exploring for diamonds is to _____ - ANSWER-
Look for the oldest parts of the earths crust
The diamond industry has changed dramatically in recent years
because _____ - ANSWER-The world's supply of diamond rough
has increased (more diamonds are available to people)
,2|Page
The Argyle mind in Australia contributed to the rise of the
cutting industry in _____ - ANSWER-India
What is the softest crystal direction in diamond? - ANSWER-
Dodecahedral
What crystal structure does diamond belong to? - ANSWER-
Isometric or cubic crystal structure
What are diamond's 3 internal crystal planes? - ANSWER-Cubic
(runs horizontal), octahedral (on face), dodecahedral (runs
vertical)
The crystal planes most suitable for cleaving a diamond are the
_______ planes? - ANSWER-Octahedral planes
Another name for the cubic system - ANSWER-Isometric
Polishes the crown and pavilion mains - ANSWER-Blocker
,3|Page
Polishing of the star and upper and lower half facets - ANSWER-
Brillianteering
Bezel facets are the ones shaped like ____ - ANSWER-Kites
Star facets are the ones shaped like _____ next to the table -
ANSWER-Triangles
Upper half facets are the ones on the ______ next to the girdle
- ANSWER-Outer edge
Visible light is a form of - ANSWER-Radiant energy
Grease on the pavilion of a diamond results in - ANSWER-More
light leakage through the pavilion
The rotary saw contributed to the diamond cutting industry by -
ANSWER-Allowing for greater weight retention from rough
A surface indentation with tiny, root-like feathers penetrating
the stone is called a _____ - ANSWER-Bruise
, 4|Page
A stone with only a few extra facets on its pavilion that can't be
seen face-up should be graded _____ - ANSWER-Flawless
Diamonds with minute inclusions that range from difficult to
very difficult to see under 10x are classified as - ANSWER-VVS1
or VVS2
Blemish; A small opening that looks like a tiny white dot at 10x -
ANSWER-Pit
An included diamond crustal that extends to the surface after
fashioning - ANSWER-Know
A long, thin crystal that looks like a tiny rod at 10x - ANSWER-
Needle
A very small included crystal that looks like a tiny dot at 10x -
ANSWER-Pinpoint
Many tightly grouped pinpoints - ANSWER-Cloud
