DCA DCA Diamond Cutting & Polish Techniques 3

Question 1

What is the ideal table percentage range for a round brilliant cut diamond according to most grading standards?

Accepted Answer

53–58%

Answer

Most gemologists consider a table percentage of approximately 53–58% optimal for maximizing brilliance and fire in a round brilliant cut diamond.

Question 2

What is a 'princess cut' diamond?

Accepted Answer

A square or rectangular brilliant cut with pointed corners

Answer

The princess cut is a square or rectangular diamond cut featuring brilliant-style faceting with uncut, pointed corners.

Question 3

What does 'depth percentage' measure in a diamond?

Accepted Answer

The depth of the stone divided by its average diameter

Answer

Depth percentage is calculated by dividing the total depth of the diamond by its average girdle diameter, expressed as a percentage.

Question 4

Which of the following is considered a 'fancy cut' diamond shape?

Accepted Answer

Marquise

Answer

The marquise is a fancy cut shape — any diamond shape other than round is called a 'fancy shape' or 'fancy cut' in the diamond trade.

Question 5

What is 'brilliance' in diamond optics?

Accepted Answer

The total light reflected from the interior and exterior of a diamond

Answer

Brilliance refers to the white light reflected back to the observer from both the surface and interior of a diamond, creating its characteristic brightness.

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

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

DCA DCA Diamond Cutting & Polish Techniques 3