Exam (elaborations)
GIA COLORED STONES ASSIGNMENT 15 EMERALDS QUESTIONS AND ANSWERS
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GIA COLORED STONES ASSIGNMENT 15 EMERALDS QUESTIONS AND ANSWERS
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Name: Score:47 Multiple choice questions
Term 1 of 47
In Colombia, modern mechanized mining of emerald by private companies began in
1980
1987
1967
1977
Term 2 of 47
The world's emeralds are judged against _______________ finest.
Peru's
Brazil's
India's
Colombia's
Term 3 of 47
Generally, the higher the chromium or vanadium content....
the more intense the green color
a bright intense green
perpendicular to the crystal length
a bright intense green
,Term 4 of 47
What's the estimated percentage of fashioned emeralds that contain filled fractures?
oil, resin
90 or more
soapy water
imitations
Term 5 of 47
Trapiche emeralds were first discovered in _______.
Muzo
Cartagena
Cali
Bogotá
Term 6 of 47
Poor ____________ can greatly reduce a finished emerald's value.
polishing
designing
cutting
mounting
Term 7 of 47
To emphasize the bluish green color, cutters orient a fashioned emerald with its table...
perpendicular to the crystal length
imitations
the more intense the green color
colombia, zambia, brazil, and zimbabwe
,Term 8 of 47
Zambian is often used to describe emeralds that are
much lighter and more yellowish than brazilian emeralds with lower clarity
completely colorless and often mistaken for quartz due to their clarity
dark green with a matte finish, often used in costume jewelry
slightly darker and more bluish than Colombian emeralds and often have higher clarity
Term 9 of 47
a stone is classified a green beryl when....
it is formed from volcanic activity and has a rough texture
it is found exclusively in riverbeds and has a smooth surface
it contains a high concentration of iron and appears reddish
its color is too light to be classified as an emerald
Term 10 of 47
Most facet-grade emerald mined in Brazil is from Itabira, Nova Era, and
Socoto
Santa Terezinha
Capoeirana
African
Term 11 of 47
Producers use flux and hydrothermal methods to _______________ emeralds.
synthesize
cut
extract
polish
, Term 12 of 47
"mossy" looking or garden like inclusions are referred to as
Grenier
Garaje
Jardin
Patio
Term 13 of 47
natural emeralds form when
beryllium, aluminium, silicon, oxygen, and one or more of the trace elements come
together
calcium and magnesium crystallize in volcanic ash
only carbon and hydrogen combine under high pressure
silica and iron oxide react in the presence of water
Term 14 of 47
The most common habit of an emerald crystal is
a cubic structure with sharp edges and corners
an elongated six-sided prism, sometimes with striations along its length
a spherical shape with a smooth surface and no facets
a flat, disc-like form that resembles a coin
Term 15 of 47
Synthetic spinel triplets are probably the most common emerald _____________ used in jewelry.
duplicates
imitations
replicas
enhancements
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