CGC Gemstone Valuation & Market Pricing Flashcards

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

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.

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

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.

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

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.

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

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.

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

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.

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

Answer: Price per carat

Price per carat is the standard metric for comparing gemstone pricing, allowing fair comparison across different sizes and weights.