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15 Cards in this Set
- Front
- Back
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A solid mineral body enclosed within a diamond (or other gem) is
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an included crystal.
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The inclusion called bearding consists of tiny
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feathers |
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Trigons are
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growth marks.
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A clarity characteristic confined to the surface of a polished gemstone is called a(n)
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blemish |
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With darkfield illumination, light is directed into the stone from
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sides |
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Inclusions are easier to see using
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darkfield illumination.
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A “paper-worn” diamond is one that has
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abrasions |
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An example of a blemish is a
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natural |
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A term used to describe any break within a diamond is
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feather |
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Which of the following is not a diamond inclusion?
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gas bubble |
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A surface indentation with tiny, root-like feathers penetrating the stone is called a
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bruise |
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A loupe used for clarity grading must be corrected for chromatic and
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spherical distortion |
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A portion of the rough’s original surface, or skin, that dips below the polished diamond’s surface is called a(n)
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indented natural.
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Which of the following is classified as an inclusion?
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Chip |
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Which of the following inclusions would threaten a diamond’s durability most?
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Feather |
