Diamonds & diamond grading
final exam Comprehensive
Questions (Frequently Tested)
with Verified Answers Graded
A+
Bourse - Answer: A diamond buying and selling club
- they have them in trading centers
Peridotite - Answer: A type of rock that diamonds form in
- igneous rock ( formed from a molten state)
- most diamond form in this rock
- has consistent release of carbon
Eglogite - Answer: A type of rock that diamond form in
- metamorphic rock (rocks that have been altered by heat and pressure
- does not have a consistent release of carbon
How far beneath the earth do diamonds form? - Answer: 90-140 miles (140-220 kilometers)
Drift - Answer: A horizontal tunnel drilled through a diamond pipe
De Beers Consolidated Mines Ltd. was named after - Answer: the owners of a farm where one of
the first diamond rushes took place.
The Central Selling Organization (CSO) - Answer: A rough diamond distribution agency
, - served as this until 2001
Pipes - Answer: The deep vertical formations through which diamonds travel to the surface
Chambering - Answer: An older underground mining technique
- expensive & dangerous so no longer used
- block caving is the alternative to this
Most of the diamonds that come from Africa are recovered from - Answer: pipe, alluvial, and
marine deposits
Most of the diamonds that come from Russia are recovered from - 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 earth's
crust
The diamond industry has changed dramatically in recent years because - Answer: the world's
supply of diamond rough has increased
- this means diamonds are available to more people
The Argyle mine in Australia contributed to the rise of the cutting industry in - Answer: India
What is the softest crystal direction in diamond? - Answer: Dodecahedral
final exam Comprehensive
Questions (Frequently Tested)
with Verified Answers Graded
A+
Bourse - Answer: A diamond buying and selling club
- they have them in trading centers
Peridotite - Answer: A type of rock that diamonds form in
- igneous rock ( formed from a molten state)
- most diamond form in this rock
- has consistent release of carbon
Eglogite - Answer: A type of rock that diamond form in
- metamorphic rock (rocks that have been altered by heat and pressure
- does not have a consistent release of carbon
How far beneath the earth do diamonds form? - Answer: 90-140 miles (140-220 kilometers)
Drift - Answer: A horizontal tunnel drilled through a diamond pipe
De Beers Consolidated Mines Ltd. was named after - Answer: the owners of a farm where one of
the first diamond rushes took place.
The Central Selling Organization (CSO) - Answer: A rough diamond distribution agency
, - served as this until 2001
Pipes - Answer: The deep vertical formations through which diamonds travel to the surface
Chambering - Answer: An older underground mining technique
- expensive & dangerous so no longer used
- block caving is the alternative to this
Most of the diamonds that come from Africa are recovered from - Answer: pipe, alluvial, and
marine deposits
Most of the diamonds that come from Russia are recovered from - 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 earth's
crust
The diamond industry has changed dramatically in recent years because - Answer: the world's
supply of diamond rough has increased
- this means diamonds are available to more people
The Argyle mine in Australia contributed to the rise of the cutting industry in - Answer: India
What is the softest crystal direction in diamond? - Answer: Dodecahedral
