: Unlike many commodities, emerald value increases exponentially rather than linearly with size. For example, a high-quality 5-carat emerald can cost 10 to 20 times more than a 1-carat stone of identical quality.
: This is the most critical factor. Stones with a deep, vivid green—often featuring blue or yellow undertones—command the highest prices.
A stone's origin acts as a "brand" that dictates its baseline market value. Global Emerald Market Economics - Gem Resources
