What is an essential characteristic of gems besides beauty and durability?

Rarity is an essential characteristic of gemstones beyond their beauty and durability. A gemstone's rarity significantly affects its value and desirability in the market. Rarer gems are often more sought after by collectors and investors, making them more valuable. Additionally, the perception of rarity can enhance a gem's appeal, as consumers may be drawn to unique stones that are not commonly found.

The concept of rarity also intersects with the historical and geographical factors that influence gemstone availability. For instance, gemstones that are difficult to mine or have limited occurrences in nature are typically considered rare, contributing to their allure and higher pricing. Understanding rarity is crucial for appreciating colored stones, as it helps inform decisions about purchasing and valuing these beautiful natural creations.