CGC CGC Gemstone Valuation & Market Pricing 1 — Questions and Answers
Question 1: Which of the four Cs has the greatest impact on a diamond's value when all other factors are equal?
- Color
- Clarity
- Carat weight
- Cut (Correct answer)
Correct answer: Cut
Cut has the greatest impact on a diamond's brilliance and overall value, as a poor cut can diminish the beauty of an otherwise high-quality stone.
Question 2: What organization publishes the Rapaport Diamond Report used as a pricing benchmark in the U.S. diamond trade?
- GIA
- AGS
- Rapaport Group (Correct answer)
- CIBJO
Correct answer: Rapaport Group
The Rapaport Group publishes the weekly Rapaport Diamond Report, which is the primary wholesale price benchmark used by diamond dealers and consultants.
Question 3: When appraising a colored gemstone for retail replacement value, which value type is typically used?
- Fair market value
- Liquidation value
- Replacement value (Correct answer)
- Investment value
Correct answer: Replacement value
Retail replacement value represents the cost to replace the item with a comparable one at retail, which is the standard for insurance appraisals.
Question 4: Which ruby origin commands the highest premium in the U.S. market due to its historical prestige and color quality?
- Thai
- African
- Burmese (Myanmar) (Correct answer)
- Sri Lankan
Correct answer: Burmese (Myanmar)
Burmese (Myanmar) rubies, especially those with 'pigeon's blood' color, command the highest premiums due to centuries of prestige and exceptional color saturation.
Question 5: What effect does a gemstone treatment disclosure have on its market value?
- It always increases value
- It generally decreases value compared to untreated stones (Correct answer)
- It has no effect on value
- It only affects value for diamonds
Correct answer: It generally decreases value compared to untreated stones
Disclosure of treatments generally decreases a gemstone's market value compared to a natural, untreated stone of equivalent appearance because untreated stones are rarer.
Question 6: Which metric is commonly used to compare per-unit pricing across gemstones of different sizes?
- Total price
- Price per gram
- Price per carat (Correct answer)
- Price per millimeter
Correct answer: Price per carat
Price per carat is the standard metric for comparing gemstone pricing, allowing fair comparison across different sizes and weights.
CGC CGC Gemstone Valuation & Market Pricing 1
Which of the four Cs has the greatest impact on a diamond's value when all other factors are equal?