GIA Diamonds and Diamond Grading Final Exam
| Most Recent Questions and Answers | 2026
Update | Exam Review Pack
• The diamond industry has changed dramatically in recent years because .
CORRECT ANSWER: the world's supply of diamond rough has increased.
• A diamond grading system provides . CORRECT ANSWER: a consistent way to
communicate diamond quality.
• Diamond's supreme hardness and durability are . CORRECT ANSWER: a result of
the conditions under which it formed.
• Wholesale price lists are usually organized according to . CORRECT ANSWER:
specific combinations of the Four Cs.
• An estimation of the value of an article is a(n) . CORRECT ANSWER: appraisal
• The most consistent and dependable sources of diamond grades are . CORRECT
ANSWER: reputable gemological laboratories.
• A diamond's clarity and color grades indicate its . CORRECT ANSWER: quality
• Once diamond deposits are located, mining companies . CORRECT ANSWER:
must spend additional time and money to evaluate and develop them.
,• Large, high-quality diamonds are . CORRECT ANSWER: graded much more
thoroughly than small, low-quality ones.
• Reputable gem laboratories don't grade mounted diamonds because . CORRECT
ANSWER: mountings hide details of clarity and cut.
• A wholesaler is someone who . CORRECT ANSWER: sells to retailers
• Diamond prices on wholesale price lists . CORRECT ANSWER: depend on the
market conditions that exist when the lists are published.
• Dealers often sort melee by size using . CORRECT ANSWER: sieves
• The Argyle mine in Australia contributed to . CORRECT ANSWER: the rise of the
cutting industry in India.
• Sightholders purchase diamond rough by . CORRECT ANSWER: attending
invitation-only trading events.
• Before the discovery of South Africa's diamond deposits, the world's two major
producers were India and . CORRECT ANSWER: Brazil
• Cecil Rhodes' main competitor in his early attempts to control diamond
production was . CORRECT ANSWER: Barney Barnato
,• The group that united in 1890 to buy and sell all of the output of the major
diamond producers, including De Beers, was the . CORRECT ANSWER: London
Diamond Syndicate
• Oppenheimer's answer to low diamond demand in the 1930s was to . CORRECT
ANSWER: shut down operations at De Beers mines.
• In the diamond trade, the word "specials" refers to . CORRECT ANSWER:
diamond rough over 10.80 cts.
• The Central Selling Organisation was a . CORRECT ANSWER: rough diamond
distribution agency.
• The South African diamond rush was sparked by . CORRECT ANSWER: the
discovery of the Star of South Africa.
• Diamond sources started appearing in South Africa during the . CORRECT
ANSWER: 1860's
• The path diamonds followed from mine to consumer was called the . CORRECT
ANSWER: diamond pipeline.
• The Diamond Information Center and the Diamond Promotion Service were
created to . CORRECT ANSWER: assist in diamond marketing efforts.
• The soft, diamond-bearing material near the surface of a diamond field was
named . CORRECT ANSWER: yellowground.
, • De Beers Consolidated Mines Ltd. was named after . CORRECT ANSWER: the
owners of a farm where one of the first diamond rushes took place.
• Who established De Beers Consolidated Mines Ltd. in 1888? . CORRECT
ANSWER: Cecil Rhodes
• De Beers requires its sightholders to have an excellent reputation in the industry
and . CORRECT ANSWER: the financial strength to make large purchase
commitments.
• Which diamond mine's huge production influenced the world market in the late
1980s? . CORRECT ANSWER: Argyle
• Because the Australians believed the CSO's marketing favored large stones over
smaller ones, they . CORRECT ANSWER: aggressively promoted jewelry set with
their own tiny gems.
• De Beers became a privately owned company in . CORRECT ANSWER: May 2001
• In South Africa, a new mining charter that designates the people of the country
as the owners of its mineral resources is a result of . CORRECT ANSWER: Black
Economic Empowerment.
• A commitment to reserve a portion of the resources derived from any country
for the economic development of that country is called . CORRECT ANSWER:
beneficiation
| Most Recent Questions and Answers | 2026
Update | Exam Review Pack
• The diamond industry has changed dramatically in recent years because .
CORRECT ANSWER: the world's supply of diamond rough has increased.
• A diamond grading system provides . CORRECT ANSWER: a consistent way to
communicate diamond quality.
• Diamond's supreme hardness and durability are . CORRECT ANSWER: a result of
the conditions under which it formed.
• Wholesale price lists are usually organized according to . CORRECT ANSWER:
specific combinations of the Four Cs.
• An estimation of the value of an article is a(n) . CORRECT ANSWER: appraisal
• The most consistent and dependable sources of diamond grades are . CORRECT
ANSWER: reputable gemological laboratories.
• A diamond's clarity and color grades indicate its . CORRECT ANSWER: quality
• Once diamond deposits are located, mining companies . CORRECT ANSWER:
must spend additional time and money to evaluate and develop them.
,• Large, high-quality diamonds are . CORRECT ANSWER: graded much more
thoroughly than small, low-quality ones.
• Reputable gem laboratories don't grade mounted diamonds because . CORRECT
ANSWER: mountings hide details of clarity and cut.
• A wholesaler is someone who . CORRECT ANSWER: sells to retailers
• Diamond prices on wholesale price lists . CORRECT ANSWER: depend on the
market conditions that exist when the lists are published.
• Dealers often sort melee by size using . CORRECT ANSWER: sieves
• The Argyle mine in Australia contributed to . CORRECT ANSWER: the rise of the
cutting industry in India.
• Sightholders purchase diamond rough by . CORRECT ANSWER: attending
invitation-only trading events.
• Before the discovery of South Africa's diamond deposits, the world's two major
producers were India and . CORRECT ANSWER: Brazil
• Cecil Rhodes' main competitor in his early attempts to control diamond
production was . CORRECT ANSWER: Barney Barnato
,• The group that united in 1890 to buy and sell all of the output of the major
diamond producers, including De Beers, was the . CORRECT ANSWER: London
Diamond Syndicate
• Oppenheimer's answer to low diamond demand in the 1930s was to . CORRECT
ANSWER: shut down operations at De Beers mines.
• In the diamond trade, the word "specials" refers to . CORRECT ANSWER:
diamond rough over 10.80 cts.
• The Central Selling Organisation was a . CORRECT ANSWER: rough diamond
distribution agency.
• The South African diamond rush was sparked by . CORRECT ANSWER: the
discovery of the Star of South Africa.
• Diamond sources started appearing in South Africa during the . CORRECT
ANSWER: 1860's
• The path diamonds followed from mine to consumer was called the . CORRECT
ANSWER: diamond pipeline.
• The Diamond Information Center and the Diamond Promotion Service were
created to . CORRECT ANSWER: assist in diamond marketing efforts.
• The soft, diamond-bearing material near the surface of a diamond field was
named . CORRECT ANSWER: yellowground.
, • De Beers Consolidated Mines Ltd. was named after . CORRECT ANSWER: the
owners of a farm where one of the first diamond rushes took place.
• Who established De Beers Consolidated Mines Ltd. in 1888? . CORRECT
ANSWER: Cecil Rhodes
• De Beers requires its sightholders to have an excellent reputation in the industry
and . CORRECT ANSWER: the financial strength to make large purchase
commitments.
• Which diamond mine's huge production influenced the world market in the late
1980s? . CORRECT ANSWER: Argyle
• Because the Australians believed the CSO's marketing favored large stones over
smaller ones, they . CORRECT ANSWER: aggressively promoted jewelry set with
their own tiny gems.
• De Beers became a privately owned company in . CORRECT ANSWER: May 2001
• In South Africa, a new mining charter that designates the people of the country
as the owners of its mineral resources is a result of . CORRECT ANSWER: Black
Economic Empowerment.
• A commitment to reserve a portion of the resources derived from any country
for the economic development of that country is called . CORRECT ANSWER:
beneficiation
