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GIA DIAMONDS AND DIAMOND
GRADING FINAL EXAM
QUESTIONS AND CORRECT
DETAILED ANSWERS
How are gem-quality rough diamonds sorted?
- Cost
- Shape
- Location
- Date mined
Correct Answer: B. Shape
What is a downstream segment of the mine to market diamond journey?
- Jewellery retail
- Rough distribution
- Cutting and polishing
- Jewellery manufacturing
Correct Answer: A. Jewellery retail
What describes a larger organization buying and joining smaller companies?
- Exploitation
- Consolidation
- Compounding
- Vertical Integration
Correct Answer: B. Consolidation
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What region was the heart of the diamond rush in South Africa?
- Kimberley
- Dutoitspan
- Cape Town
- Zandfontein
Correct Answer: D. Zandfontein
What diamond's discovery led to the modern diamond industry?
- Hope
- Eureka
- Koh-i-Noor
- Star of South Africa
Correct Answer: D. Star of South Africa
What is characteristic of minerals?
- Rocks
- Organic
- Aggregate structure
- Chemical composition
Correct Answer: D. Chemical composition
What layer is molten?
- Crust
- Mantle
- Outer core
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- Transition Zone
Correct Answer: C. Outer core
Where are most diamond deposits found?
- Rivers
- Oceans
- Cratons
- Mountains
Correct Answer: C. Cratons
Where do most diamonds form and reside?
- Mantle keels
- Transition zone
- Continental crust
- Oceanic lithosphere
Correct Answer: A. Mantle keels
What is an example of a superdeep diamond?
- Junia
- Crustal
- Carbonado
- Lithospheric
Correct Answer: A. Junia
What kind of rock creates a primary diamond deposit?
- Eclogite
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- Peridotite
- Kimberlite
- Sedimentary
Correct Answer: C. Kimberlite
How do geologists locate cratons?
- X-ray
- Radar
- Soil sampling
- Geological mapping
Correct Answer: D. Geological mapping
How does ore removal start in a primary deposit?
- Drifts
- Shafts
- Vacuums
- Low-velocity charges
Correct Answer: D. Low-velocity charges
What might perovskite in a mineral sample indicate?
- An ancient glacier
- A secondary deposit
- Gem-quality diamonds
- A nearby primary deposit