Diamonds and Diamond Grading Practice Exam 2 Questions and Answers
Graded A+
B. Sort the rough
What value-adding process does a diamond mining com-
Rough sorting is the first value-adding process on this
pany perform?
journey and is critical in a mining company's profitability.
A. Transport ore
A value-adding process adds something to a product that
B. Sort the rough
increases its value for consumers. See "The Rough Dia-
C. Cut and polish rough
mond Sorting Process" in Diamonds & Diamond Grading
D. Deliver cut diamonds
Assignment 2.
D. Diamond Producers Association (DPA)
In 2015 several majors—ALROSA, De Beers, Dominion
What trade organization formed in 2015 to expand de-
Diamond Mines, Gem Diamonds, Lucara Diamond Corp.,
mand for the diamond industry?
RZM Murowa, Petra Diamonds, and Rio Tinto—formed
A. London Diamond Syndicate (LDS)
the Diamond Producers Association (DPA). The associa-
B. Diamond Trading Company (DTC)
tion has initiated several campaigns targeting consumer
C. Central Selling Organisation (CSO)
trends, such as women purchasing jewelry for themselves.
D. Diamond Producers Association (DPA)
See "Marketing in the New Era" in Diamonds & Diamond
Grading Assignment 2.
B. Internet
What advertising method is key to the current diamond
With the Internet and social media impacting consumers'
jewelry market?
free time, marketing channels have become further diver-
A. Print
sified. Traditional TV campaigns are still powerful but no
B. Internet
longer the only way to get the message out. See "Mar-
C. Television
keting in the New Era" in Diamonds & Diamond Grading
D. Outdoor billboards
Assignment 2.
B. Bort
What industrial-grade diamond typically forms as single
The first step in sorting is to separate gem-quality dia-
very included crystals?
monds from industrial diamonds, known as bort in the
A. Ore
trade. Bort is a form of diamond that usually occurs as
B. Bort
very included single crystals in yellows, grays, and browns.
C. Gravel
See "The Rough Diamond Sorting Process" in Diamonds
D. Carbonado
& Diamond Grading Assignment 2.
,Diamonds and Diamond Grading Practice Exam 2 Questions and Answers
Graded A+
A. Expenses
What made it diflcult for independent claim holders to
For those who mined the hard materials and went deep-
survive during the diamond rush in South Africa?
er, more capital investment was needed for advanced
A. Expenses
equipment and enhanced safety measures. To address
B. Severe weather
this issue, miners began to form partnerships and small
C. Global pandemic
companies. See "Gaining Market Control" in Diamonds &
D. Diamond shortage
Diamond Grading Assignment 2.
D. Iron
What metal dominates melts related to CLIPPIR diamond These melts were the growth medium of CLIPPIR dia-
formation? monds. This medium is an ideal low-oxygen environment
A. Titanium for diamond formation because it is rich in metals such
B. Nickel as iron that can dissolve carbon from the oceanic plate
C. Lead without any oxygen. This frees the carbon to bond with
D. Iron other carbon and form diamond. See "CLIPPIR Diamonds"
in Diamonds & Diamond Grading Assignment 3.
What layer is solid but has a portion that is mobile?
B. Mantle
A. Crust
The mantle is solid at its uppermost part. Below this it is
B. Mantle
also solid but mobile. See "The Crust, Mantle, and Core"
C. Inner core
in Diamonds & Diamond Grading Assignment 3.
D. Lithosphere
Which of these is a metamorphic rock? A. Eclogite
A. Eclogite Studies have found that most diamonds form in two types
B. Peridotite of rocks: peridotite, an igneous rock, and eclogite, a meta-
C. Kimberlite morphic rock. See "Source Rocks for Diamond Crystalliza-
D. Lamproite tion" in Diamonds & Diamond Grading Assignment 3.
D. Mantle keels
Where do most lithospheric diamonds form? The majority of diamonds mined are thought to form
A. Pipes based on two models: lithospheric and superdeep.
B. Lamproite Lithospheric diamonds form under cratons in mantle
keels. See "Diamond Formation Models" and "Formation
, Diamonds and Diamond Grading Practice Exam 2 Questions and Answers
Graded A+
C. Outer core of Superdeep Diamonds" in Diamonds & Diamond Grad-
D. Mantle keels ing Assignment 3.
What is an example of a superdeep diamond? A. Blue
A. Blue CLIPPIR diamonds, blue diamonds, and Brazil's Juína di-
B. Crustal amonds are three well-studied examples of superdeep
C. Carbonado diamonds. See "Formation of Superdeep Diamonds" in
D. Lithospheric Diamonds & Diamond Grading Assignment 3.
C. Secondary
What deposit type produces a higher percentage of
Secondary deposits are usually much richer in diamonds
gem-quality stones?
than primary deposits. This is because the host rock and
A. Primary
lighter rock materials erode and wash away, leaving con-
B. Original
centrations of diamonds and heavier minerals. See "Sec-
C. Secondary
ondary Deposits" in Diamonds & Diamond Grading As-
D. Overburden
signment 4.
What type of survey helps narrow the search for secondary
diamond deposits? C. Mineral sampling
A. Gravity Alluvial deposit exploration often uses mineral sampling.
B. Seismic See "Narrowing the Search" in Diamonds & Diamond
C. Mineral sampling Grading Assignment 4.
D. Character sampling
How are diamonds recovered? B. Grease belt
A. Vacuuming Recovery can be accomplished by ditterent methods.
B. Grease belt Grease belt and X-ray separation are both common. See
C. Magnetic separation "Diamond Recovery" in Diamonds & Diamond Grading
D. Heavy media separation Assignment 4.
C. Diamond
What mineral indicates a potential alluvial deposit? Common indicator minerals found in association with
A. Boron kimberlite and lamproite include red and orange gar-
B. Carbon net, black spinel, diopside, olivine, ilmenite, chromite, and
perovskite. Tiny diamonds in the samples are especial-
Graded A+
B. Sort the rough
What value-adding process does a diamond mining com-
Rough sorting is the first value-adding process on this
pany perform?
journey and is critical in a mining company's profitability.
A. Transport ore
A value-adding process adds something to a product that
B. Sort the rough
increases its value for consumers. See "The Rough Dia-
C. Cut and polish rough
mond Sorting Process" in Diamonds & Diamond Grading
D. Deliver cut diamonds
Assignment 2.
D. Diamond Producers Association (DPA)
In 2015 several majors—ALROSA, De Beers, Dominion
What trade organization formed in 2015 to expand de-
Diamond Mines, Gem Diamonds, Lucara Diamond Corp.,
mand for the diamond industry?
RZM Murowa, Petra Diamonds, and Rio Tinto—formed
A. London Diamond Syndicate (LDS)
the Diamond Producers Association (DPA). The associa-
B. Diamond Trading Company (DTC)
tion has initiated several campaigns targeting consumer
C. Central Selling Organisation (CSO)
trends, such as women purchasing jewelry for themselves.
D. Diamond Producers Association (DPA)
See "Marketing in the New Era" in Diamonds & Diamond
Grading Assignment 2.
B. Internet
What advertising method is key to the current diamond
With the Internet and social media impacting consumers'
jewelry market?
free time, marketing channels have become further diver-
A. Print
sified. Traditional TV campaigns are still powerful but no
B. Internet
longer the only way to get the message out. See "Mar-
C. Television
keting in the New Era" in Diamonds & Diamond Grading
D. Outdoor billboards
Assignment 2.
B. Bort
What industrial-grade diamond typically forms as single
The first step in sorting is to separate gem-quality dia-
very included crystals?
monds from industrial diamonds, known as bort in the
A. Ore
trade. Bort is a form of diamond that usually occurs as
B. Bort
very included single crystals in yellows, grays, and browns.
C. Gravel
See "The Rough Diamond Sorting Process" in Diamonds
D. Carbonado
& Diamond Grading Assignment 2.
,Diamonds and Diamond Grading Practice Exam 2 Questions and Answers
Graded A+
A. Expenses
What made it diflcult for independent claim holders to
For those who mined the hard materials and went deep-
survive during the diamond rush in South Africa?
er, more capital investment was needed for advanced
A. Expenses
equipment and enhanced safety measures. To address
B. Severe weather
this issue, miners began to form partnerships and small
C. Global pandemic
companies. See "Gaining Market Control" in Diamonds &
D. Diamond shortage
Diamond Grading Assignment 2.
D. Iron
What metal dominates melts related to CLIPPIR diamond These melts were the growth medium of CLIPPIR dia-
formation? monds. This medium is an ideal low-oxygen environment
A. Titanium for diamond formation because it is rich in metals such
B. Nickel as iron that can dissolve carbon from the oceanic plate
C. Lead without any oxygen. This frees the carbon to bond with
D. Iron other carbon and form diamond. See "CLIPPIR Diamonds"
in Diamonds & Diamond Grading Assignment 3.
What layer is solid but has a portion that is mobile?
B. Mantle
A. Crust
The mantle is solid at its uppermost part. Below this it is
B. Mantle
also solid but mobile. See "The Crust, Mantle, and Core"
C. Inner core
in Diamonds & Diamond Grading Assignment 3.
D. Lithosphere
Which of these is a metamorphic rock? A. Eclogite
A. Eclogite Studies have found that most diamonds form in two types
B. Peridotite of rocks: peridotite, an igneous rock, and eclogite, a meta-
C. Kimberlite morphic rock. See "Source Rocks for Diamond Crystalliza-
D. Lamproite tion" in Diamonds & Diamond Grading Assignment 3.
D. Mantle keels
Where do most lithospheric diamonds form? The majority of diamonds mined are thought to form
A. Pipes based on two models: lithospheric and superdeep.
B. Lamproite Lithospheric diamonds form under cratons in mantle
keels. See "Diamond Formation Models" and "Formation
, Diamonds and Diamond Grading Practice Exam 2 Questions and Answers
Graded A+
C. Outer core of Superdeep Diamonds" in Diamonds & Diamond Grad-
D. Mantle keels ing Assignment 3.
What is an example of a superdeep diamond? A. Blue
A. Blue CLIPPIR diamonds, blue diamonds, and Brazil's Juína di-
B. Crustal amonds are three well-studied examples of superdeep
C. Carbonado diamonds. See "Formation of Superdeep Diamonds" in
D. Lithospheric Diamonds & Diamond Grading Assignment 3.
C. Secondary
What deposit type produces a higher percentage of
Secondary deposits are usually much richer in diamonds
gem-quality stones?
than primary deposits. This is because the host rock and
A. Primary
lighter rock materials erode and wash away, leaving con-
B. Original
centrations of diamonds and heavier minerals. See "Sec-
C. Secondary
ondary Deposits" in Diamonds & Diamond Grading As-
D. Overburden
signment 4.
What type of survey helps narrow the search for secondary
diamond deposits? C. Mineral sampling
A. Gravity Alluvial deposit exploration often uses mineral sampling.
B. Seismic See "Narrowing the Search" in Diamonds & Diamond
C. Mineral sampling Grading Assignment 4.
D. Character sampling
How are diamonds recovered? B. Grease belt
A. Vacuuming Recovery can be accomplished by ditterent methods.
B. Grease belt Grease belt and X-ray separation are both common. See
C. Magnetic separation "Diamond Recovery" in Diamonds & Diamond Grading
D. Heavy media separation Assignment 4.
C. Diamond
What mineral indicates a potential alluvial deposit? Common indicator minerals found in association with
A. Boron kimberlite and lamproite include red and orange gar-
B. Carbon net, black spinel, diopside, olivine, ilmenite, chromite, and
perovskite. Tiny diamonds in the samples are especial-
