CGC Gemstone Valuation & Market Pricing Flashcards

Which factor causes a disproportionate increase in price as emerald carat weight increases?

Answer: Large, high-quality emeralds are exponentially rarer

Large, high-quality emeralds are exponentially rarer in nature, so prices per carat increase disproportionately as size increases.

What is the primary reference used by U.S. gemstone consultants for colored stone market pricing?

Answer: Gemworld International's Guide

Gemworld International's 'The Guide' is the most widely referenced pricing publication for colored gemstones in the U.S. trade.

How does saturation affect the value of a colored gemstone?

Answer: Higher saturation generally increases value up to the optimal tone

Higher color saturation generally increases value, but extremely dark tones can reduce value by masking brilliance, so optimal saturation is key.

Which type of sapphire color commands the highest price per carat in the U.S. market?

Answer: Royal blue

Royal blue sapphires, particularly those from Kashmir and Burma, command the highest prices per carat due to their exceptional color and rarity.

What is 'market value' in the context of gemstone appraisal?

Answer: The price agreed upon between a willing buyer and seller with full market knowledge

Market value (fair market value) is the price at which property would change hands between a willing buyer and seller, both having reasonable knowledge of the facts.

Which certification body's laboratory reports are most widely accepted in U.S. gemstone transactions?

Answer: GIA

GIA (Gemological Institute of America) laboratory reports are the most widely trusted and accepted in U.S. gemstone and diamond transactions.