Chapter 10 Key Concepts & Terms Flashcards
What does the GIA Diamond Grading System provide?
A universally accepted way to communicate diamond quality.
What factors influence the clarity grade of a diamond?
Size, number, location, relief, and nature of clarity characteristics.
Which inclusions usually have the greatest influence on clarity grade?
Large inclusions.
Why is it difficult to develop a precise description of any clarity grade except Flawless?
No two diamonds are alike.
Blemishes rarely affect grades lower than which clarity grade?
IF.
How is a clarity grade usually determined?
By the largest or most visible characteristics.
Which types of stones can have eye-visible inclusions?
VS, SI, and I stones.
What does accurate clarity grading include?
Consideration of the size and shape of the diamond in relation to its clarity characteristics.
What does ‘eye-visible’ mean?
Visible to the unaided eye, without magnification.
What are grade-setting characteristics?
Inclusions or blemishes that establish the clarity grade of a diamond.
What is a plot in diamond grading?
A map of a diamond’s inclusions, blemishes, and facet arrangement.
What does relief refer to in the context of diamond clarity?
Contrast between an inclusion and its host gem.
