Exam (elaborations)
GIA COLORED STONES ASSIGNMENT 13 BLUE SAPPHIRE QUESTIONS AND ANSWERS
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GIA COLORED STONES ASSIGNMENT 13 BLUE SAPPHIRE QUESTIONS AND ANSWERS
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Name: Score:35 Multiple choice questions
Definition 1 of 35
When did Madagascar become a significant source of blue sapphire?
1990's
1970's
1950's
1940's
Definition 2 of 35
Most fine sapphires over 100 cts. are from ____ _________.
Sri Lanka
Madagascar
Thailand
Vietnam
Definition 3 of 35
Fine-quality, untreated sapphires make up a small but extremely __________ segment of the
sapphire market.
common
cheap
worthless
valuable
,Definition 4 of 35
What are the most highly valued hues of blue sapphire?
blue to greenish blue.
blue to green-blue.
blue to violetish blue
thailand
Definition 5 of 35
The trace elements ______ and ___________ cause the blue of sapphire.
copper, zinc
lead, mercury
gold, silver
iron, titanium
Definition 6 of 35
________ _________ is the most common sapphire synthesis method.
chemical synthesis
flame fusion
natural formation
pressure treatment
Definition 7 of 35
__________ is one of the world's largest sources of dark blue, commercial-quality sapphires.
Mexico
South Africa
Australia
Canada
, Definition 8 of 35
Blue sapphire's pleochroic colors are typically...
dark brown and light gray
deep red and bright yellow
pure black and bright white
slightly greenish blue and slightly violetish blue
Definition 9 of 35
___________ has become a significant source of good- to fine-quality blue sapphires.
Colombia
Argentina
Madagascar
Peru
Definition 10 of 35
What is the most commonly seen characteristic in sapphire?
color zoning
color range
popular
color center
Definition 11 of 35
___ ___________ buy about half of the blue sapphires on the world market.
African miners
US consumers
Asian traders
European collectors
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