Ass # 9 Clarity : Key Terms and Concepts

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Questions and Answers

What does the term 'blemish' refer to in the context of gemstones?

An internal inclusion affecting the overall clarity

A type of illumination used in gemstone grading

A treatment process for enhancing clarity

A characteristic solely found on the surface of a polished gemstone (correct)

Which illumination method uses a black non-reflective background?

Reflected illumination

Darkfield illumination (correct)

Brightfield illumination

Flash effect illumination

What is a feather in diamond terminology?

Any break in a diamond (correct)

A method of grading diamond quality

A type of clarity characteristic exclusive to colored diamonds

A natural imperfection caused by the diamond cutting process

What does fracture filling in a diamond involve?

Injecting molten glass into the diamond’s surface Signup and view all the answers

During diamond grading, which characteristic is critical for setting a diamond's value?

Clarity characteristics Signup and view all the answers

What should you disclose regarding laser drilling in diamonds?

Its presence must be disclosed Signup and view all the answers

Which tool is recommended for grading diamonds effectively?

A triplet loupe with correction lenses Signup and view all the answers

What is the 'flash effect' in diamonds?

The appearance of changing color in fracture-filled diamonds Signup and view all the answers

What does the 'depth of field' refer to in diamond magnification?

The clear and sharp distance above and below the point of focus Signup and view all the answers

How can a natural feature be viewed in terms of diamond cutting?

As a sign of efficient cutting Signup and view all the answers

What lighting to create a bright background with light being directed from below?

Brightfield Illumination Signup and view all the answers

What clarity characteristic totally is enclosed in a polished gemstone or extending into it from the surface ?

Inclusion Signup and view all the answers

Definition of Clarity Characteristic ...

Internal or external feature of a gemstone that helps determine its quality and establish its identity. Signup and view all the answers

What is one of the most important aspects of the GIA Diamond Grading System?

Clarity Grading Signup and view all the answers

When noting inclusions and blemishes you should use ...

Abbreviations Signup and view all the answers

Your first impression of what appearance should strongly influence its clarity grade?

Face Up Appearance Signup and view all the answers

Study Notes

Key Terms and Concepts

Blemish: Clarity characteristic limited to a gemstone's surface.
Brightfield Illumination: Diamond lighting from below, creating a bright background.
Clarity Characteristic: Internal/external gemstone feature influencing quality and identification.
Darkfield Illumination: Diamond lighting from the side, against a black background.
Depth of Field: Clear and sharp focus distance above and below a focal point.
Feather: A diamond break.
Flash Effect: Color change in a fracture-filled diamond, observed parallel to the filling.
Fracture Filling: Molten glass injection into a diamond to fill cracks.
Inclusion: Enclosed clarity characteristic within or extending from a gemstone's surface.

Key Concepts

Clarity Grading: Crucial aspect of the GIA Diamond Grading System.
Clarity Characteristics: Determine a stone's clarity grade, value, and identity.
Diamond Face-up Appearance: Strongly influences clarity grade.
Diamond Grading Loupe: Quality loupe with magnification lenses.
Inclusions and Blemishes: Use abbreviations to note these.
Laser Drilling: Disclosure of presence is required.
Natural Characteristics: Efficient cutting can be implied by a gemstone's naturally occurring features.

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Description

This quiz explores essential terms and concepts related to diamond clarity, including various illumination techniques, clarity characteristics, and their impact on grading. Test your understanding of how these features affect the quality and value of diamonds.