Exam (elaborations)
GIA COLORED STONES ASSIGNMENT 4 QUESTIONS AND ANSWERS
- Course
- Institution
GIA COLORED STONES ASSIGNMENT 4 QUESTIONS AND ANSWERS
[Show more]
Content preview
Name: Score:56 Multiple choice questions
Definition 1 of 56
What is the only type of gem that can show pleochroism?
singly refractive
doubly refractive
faceted
diamond simulant
Definition 2 of 56
Change in speed and possible change in direction of light as it travels from one material to
another.
refraction
asterism
iron
convection
Definition 3 of 56
Which element causes the finest reds and greens in gemstones?
cobalt
chromium
vanadium
aluminum
,Definition 4 of 56
Which components of a transition element's atoms can produce color in gems?
protons
light
neutrons
electrons
Definition 5 of 56
Which element causes the color of both almandine and peridot?
iron
nitrogen
oxygen
aluminum
Definition 6 of 56
What produces either darkness of the brightening of one or more colors?
iridescence
asterism
treatment
interference
Definition 7 of 56
What transition element causes a greater variety of gem colors than any other transition
element?
iron
aluminum
nitrogen
oxygen
,Definition 8 of 56
When a gem's crystal structure doesn't change incoming light other than by refraction and and
absorption.
double refraction
interference
diffraction
single refraction
Definition 9 of 56
A gem colored by trace elements in its crystal structure.
allochromatic
pleochroism
chatoyancy
nesosilicate
Definition 10 of 56
When a gem's crystal structure splits light into two rays that each travel at a slightly different
speed and direction, it's called ____________________.
double refraction
single reflection
triple diffraction
polarized absorption
, Definition 11 of 56
A process where the electrons that selectively absorb light are passed back and forth
between neighboring impurity ions.
interference
charge transfer
absorption spectrum
electrons
Definition 12 of 56
A broad flash of color in labradorite feldspar that disappears when the gem is moved.
fluorescence
adularescence
iridescence
labradorescence
Definition 13 of 56
What can alter or initiate some color-causing charge transfer reactions?
diffraction
independent variable
correlation
treatment
Definition 14 of 56
Which transition element causes a greater variety of gem colors than any other?
aluminum
oxygen
nitrogen
iron
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller selftest. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79223 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now