DCA Diamond Grading & Classification 2

Question 1

Which GIA clarity grade describes a diamond with inclusions visible to a skilled grader under 10x magnification that are noticeable and somewhat easy to see?

Accepted Answer

SI2

Answer

SI2 (Slightly Included 2) inclusions are noticeable and somewhat easy to see under 10x magnification, whereas SI1 inclusions are harder to detect.

Question 2

On the GIA color grading scale, what letter grade marks the boundary between 'near colorless' and 'faint color' categories?

Accepted Answer

J

Answer

J is the last grade in the 'near colorless' range (G–J); K begins the 'faint color' range on the GIA scale.

Question 3

A diamond graded 'Excellent' for cut by the GIA achieves what characteristic as its top priority?

Accepted Answer

Optimal brightness, fire, and scintillation

Answer

An Excellent cut grade prioritizes the optimal balance of brightness, fire, and scintillation rather than preserving rough weight.

Question 4

Which facet on a round brilliant diamond is the large flat top surface?

Accepted Answer

Table

Answer

The table is the large octagonal flat facet on the very top of a round brilliant diamond.

Question 5

What term describes the white or grayish face-up appearance caused by an overly deep or overly shallow cut diamond?

Accepted Answer

Nail head

Answer

A 'nail head' is the dark circular shadow visible in very deep-cut diamonds, caused by light leaking through the pavilion at extreme angles.

(DCA) Certified Diamond Council of America Diamond Specialist Practice Test

(DCA) Certified Diamond Council of America Diamond Specialist Practice Test

DCA Diamond Grading & Classification 2