CGC CGC Gemstone Valuation & Market Pricing

Question 1

Which of the four Cs has the greatest impact on a diamond's value when all other factors are equal?

Accepted Answer

Cut

Answer

Color

Answer

Clarity

Answer

Carat weight

Question 2

What organization publishes the Rapaport Diamond Report used as a pricing benchmark in the U.S. diamond trade?

Accepted Answer

Rapaport Group

Answer

GIA

Answer

AGS

Answer

CIBJO

Question 3

When appraising a colored gemstone for retail replacement value, which value type is typically used?

Accepted Answer

Replacement value

Answer

Fair market value

Answer

Liquidation value

Answer

Investment value

Question 4

Which ruby origin commands the highest premium in the U.S. market due to its historical prestige and color quality?

Accepted Answer

Burmese (Myanmar)

Answer

Thai

Answer

African

Answer

Sri Lankan

Question 5

What effect does a gemstone treatment disclosure have on its market value?

Accepted Answer

It generally decreases value compared to untreated stones

Answer

It always increases value

Answer

It has no effect on value

Answer

It only affects value for diamonds

Question 6

Which metric is commonly used to compare per-unit pricing across gemstones of different sizes?

Accepted Answer

Price per carat

Answer

Total price

Answer

Price per gram

Answer

Price per millimeter