CS 10 Flashcards
1
Q
- In which of the following colored stone clarity grades do the definitions vary for each clarity type?
A. Eye-clean
B. Heavily included
C. Severely included
D. Moderately included
A
Moderately included
2
Q
- The highest clarity grade for colored stones is
A. flawless.
B. eye-clean.
C. internally flawless.
D. very very slightly included.
A
eye clean
3
Q
- Which of these gems is classified as Type III?
A. Ruby
B. Topaz
C. Emerald
D. Chrysoberyl
A
Emerald
4
Q
- Fingerprints are
A. pits.
B. fractures.
C. blemishes.
D. partially healed fracture planes.
A
partially healed fracture planes.
5
Q
- Two factors that determine an inclusion’s impact on a gem’s value are
A. size and shape.
B. position and relief.
C. location and shape.
D. crystal system and size.
A
position and relief.
6
Q
- A general term for a break in a stone is
A. chip.
B. cavity.
C. feather.
D. fingerprint.
A
Feather
7
Q
- Inclusions are important to gemologists because they
A. usually increase a gem’s value.
B. usually create attractive phenomena.
C. always identify a gem’s geographic origin.
D. can help separate natural from synthetic gems.
A
can help separate natural from synthetic gems
8
Q
- The term “silk” describes
A. intersecting fractures.
B. intersecting scratches.
C. a group of included crystals.
D. a group of fine, needle-like inclusions.
A
a group of fine, needle-like inclusions
9
Q
- An angular, hollow space that resembles a mineral inclusion is called a
A. needle.
B. crystal.
C. pinpoint.
D. negative crystal.
A
negative crystal
10
Q
- Growth zoning in a colored stone is evidence of
A. fashioning.
B. heat treatment.
C. crystal growth.
D. fracture filling.
A
crystal growth
11
Q
- Which of these clarity characteristics usually have the greatest impact on a gem’s marketability?
A. A cavity on its pavilion
B. A large, unhealed feather under its table
C. A small, dark crystal under its crown facets
D. A low-relief liquid inclusion under its table
A
A large, unhealed feather under its table
12
Q
- In which colored stone clarity type are the gems usually eye-clean?
A. Type I
B. Type II
C. Type III
D. Type IV
A
Type 1
13
Q
- A characteristic or irregularity confined to the surface of a polished gemstone is a(n)
A. cavity.
B. blemish.
C. fracture.
D. inclusion.
A
Blemish
14
Q
- Gems that are usually eye-clean include
A. peridot, spinel, and quartz.
B. ruby, alexandrite, and andalusite.
C. spodumene, yellow beryl, and aquamarine.
D. red beryl, emerald, and watermelon tourmaline.
A
spodumene, yellow beryl, and aquamarine
15
Q
- An inclusion with the most negative impact on a colored stone’s clarity would be located
A. near the girdle.
B. under the table.
C. under a crown facet.
D. under a crown main.
A
under the table.