CS 10 Flashcards

1
Q
  1. 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

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2
Q
  1. The highest clarity grade for colored stones is
    A. flawless.
    B. eye-clean.
    C. internally flawless.
    D. very very slightly included.
A

eye clean

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3
Q
  1. Which of these gems is classified as Type III?
    A. Ruby
    B. Topaz
    C. Emerald
    D. Chrysoberyl
A

Emerald

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4
Q
  1. Fingerprints are
    A. pits.
    B. fractures.
    C. blemishes.
    D. partially healed fracture planes.
A

partially healed fracture planes.

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5
Q
  1. 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.

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6
Q
  1. A general term for a break in a stone is
    A. chip.
    B. cavity.
    C. feather.
    D. fingerprint.
A

Feather

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7
Q
  1. 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

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8
Q
  1. 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

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9
Q
  1. An angular, hollow space that resembles a mineral inclusion is called a
    A. needle.
    B. crystal.
    C. pinpoint.
    D. negative crystal.
A

negative crystal

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10
Q
  1. Growth zoning in a colored stone is evidence of
    A. fashioning.
    B. heat treatment.
    C. crystal growth.
    D. fracture filling.
A

crystal growth

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11
Q
  1. 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

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12
Q
  1. 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

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13
Q
  1. 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

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14
Q
  1. 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

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15
Q
  1. 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.

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