What are 'value factors' when discussing pearls?

'Value factors' in the context of pearls refer to the specific features used to evaluate the quality and overall value of pearls. These factors include characteristics such as luster, surface quality, shape, color, and size, all of which contribute to a pearl's desirability and market value. Understanding these aspects is crucial for anyone involved in buying, selling, or appraising pearls since they collectively determine how a pearl is perceived in terms of quality and worth.

While other aspects like market demand and design elements may influence the perceived value of pearls, they do not encompass the broader assessment criteria that 'value factors' imply. The correct answer provides a comprehensive framework for understanding how each pearl is evaluated within the gemstone industry.