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GIA Colored Stones Final Exam Latest Update Actual Exam 600+ Questions and 100% Verified Correct Answers Already Graded A+ Verified by Professor
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GIA Colored Stones Final Exam Latest Update Actual Exam 600+ Questions and 100% Verified Correct Answers Already Graded A+ Verified by Professor

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  • September 4, 2024
  • 55
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • gia colored stones final exam latest update 2024 2

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GIA Colored Stones Final Exam Latest Update
2024-2025 Actual Exam 600+ Questions and
100% Verified Correct Answers Already Graded
A+ Verified by Professor

"Inky" sapphires generally originate from... - CORRECT ANSWER: Australia


"Thai" sapphires are ______ to ______ in color and often described as ______ or
_______. - CORRECT ANSWER: Violetish blue to slightly greenish blue
Inky blue or blue-black


11. The color change in alexandrite is caused by - CORRECT ANSWER: Slight
impurities in Chromium


14. The hydrothermal synthetic process requires a - CORRECT ANSWER: Pressurized
steel container and crushed chemical ingredients.


2 countries that account for 75% of emerald purchases worldwide - CORRECT
ANSWER: US and Japan


2 methods used to synthesize emeralds - CORRECT ANSWER: 1. Flux
2. Hydrothermal


2 through 8 - CORRECT ANSWER:


21. Pearls-Hank - CORRECT ANSWER: A number of similar cultured pearl strands
bundled together


3 treatments used with lapis - CORRECT ANSWER: 1. dyed

,2. impregnated with wax or plastic
3. heated then dyed


7. The type of matrix found as a layer in finished boulder opal is - CORRECT ANSWER:
Ironstone


A Burmese sapphire's blue is known as ______ blue and is considered somewhat
_______. - CORRECT ANSWER: Royal; inky


A characteristic or irregularity confined to the surface of a polished gemstone is a(n) -
CORRECT ANSWER: Blemish


A common sapphire characteristic - CORRECT ANSWER: Color zoning


A cryptocrystalline quartz aggregate - CORRECT ANSWER: Chalcedony


A crystal growth habit with bumpy appearance
(similar to a bunch of grapes) - CORRECT ANSWER: Botryodal


A gem produced by, or derived from, a living organism is - CORRECT ANSWER:
Organic.


A Kashmir sapphire's blue is also known as - CORRECT ANSWER: Cornflower blue


A laboratory-created gem with essentially the same chemical composition, crystal
structure, and properties as its natural counterpart is a(n) - CORRECT ANSWER:
Synthetic.


A large - CORRECT ANSWER: unhealed feather

,A new turquoise treatment that appeared in the 1980s and has been used to treat 10
million+ cts - CORRECT ANSWER: Zachary method


A property of some xtls that causes them to vibrate at a constant frequency when
subjected to an electrical current - CORRECT ANSWER: Piezolectricity


A smokey corundum that turns blue when treated - CORRECT ANSWER: Dhun


A snakeskin structural pattern is typical of - CORRECT ANSWER: Synthetic opal.


A substance that consists of atoms of only one kind - CORRECT ANSWER: Chemical
element


A table-cut gem with a flat or slightly domed top and sometimes a carved design,
typically set in men's rings and cufflinks - CORRECT ANSWER: Signet


A transparent quartz, usually rock xtl, that contains eye-visible inclusions, often named
according to the type of inclusions it contains - CORRECT ANSWER: Sagenitic


A two-phase inclusion is a cavity in a gem that's typically filled with - CORRECT
ANSWER: A liquid and a gas.


A type of sagenitic quartz containing ndl-like rutile inclusions - CORRECT ANSWER:
Rutilated quartz


A type of sagentic quartz contaiing ndl-like or rod-like tourmaline inclusions - CORRECT
ANSWER: Tourmalated quartz


A unit cell defines a mineral's - CORRECT ANSWER: Basic identity.

, Absorption spectrum. - CORRECT ANSWER: The pattern of dark lines or bands shown
by certain colored gems when viewed through a spectroscope.


Adularescence is caused by - CORRECT ANSWER: scattering of light


Adularescence is caused by - CORRECT ANSWER: Scattering of light.


After irradiation, which gem's color is stable under normal wearing conditions? -
CORRECT ANSWER: Golden beryl


Amazonite is an imitation of what stone? - CORRECT ANSWER: Turquoise


Are Spinels a good substitute for Tanzanite? - CORRECT ANSWER: No, Spinels are
singly refractive; they don't show doubly, they can't show pleocroism.


Assignment 10 - CORRECT ANSWER:


Assignment 11 - CORRECT ANSWER:


Assignment 12 - CORRECT ANSWER:


Assignment 13 - CORRECT ANSWER:


Assignment 14 - CORRECT ANSWER:


Assignment 15 - CORRECT ANSWER:


Assignment 16 - CORRECT ANSWER:

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