Gemology Gemstone Grading & Evaluation

Question 1

Which of the following is NOT one of the 4 Cs used in diamond grading?

Accepted Answer

Calibration

Answer

Carat

Answer

Cut

Answer

Color

Question 2

What does 'clarity' refer to in gemstone evaluation?

Accepted Answer

Presence of internal or surface flaws

Answer

The weight of the stone

Answer

The intensity of its color

Answer

The way it reflects light

Question 3

Which tool is most commonly used to determine the carat weight of a gemstone?

Accepted Answer

Precision scale

Answer

Microscope

Answer

Caliper

Answer

Refractometer

Question 4

In color grading of gemstones, which three attributes are considered?

Accepted Answer

Hue, tone, and saturation

Answer

Brightness, contrast, and luster

Answer

Clarity, carat, and polish

Answer

Weight, size, and luster

Question 5

Which cut is known for maximizing the brilliance of a diamond?

Accepted Answer

Round brilliant cut

Answer

Emerald cut

Answer

Cushion cut

Answer

Princess cut

Question 6

What is the primary factor that determines the value of colored gemstones?

Accepted Answer

Color

Answer

Clarity

Answer

Cut

Answer

Origin