What is a negative crystal?

A negative crystal refers to an angular, hollow space within a gem that resembles a mineral inclusion. This term is used to describe a type of void or cavity that has formed during the crystallization process, often reflecting the shape of the surrounding minerals. It is important in gemology because negative crystals can affect the overall clarity and appearance of a gemstone, influencing its value and desirability.

The characteristics of negative crystals can often be seen in minerals like quartz, where the shape of the hollow space within the crystal mimics the structure of the mineral surrounding it. This phenomenon is significant for gemologists, as it provides insight into the formation and history of the gemstone, as well as contributing to the identification and classification of the stone.

The other options do not accurately represent what a negative crystal is. The description involving visible facets relates more to the cut of a gem rather than its internal structures. The concept of enhancement to increase brilliance pertains to treatments applied to gems, which is unrelated to the definition of negative crystals. Lastly, a crystal being dissolved in production refers to a process that does not correspond with the physical characteristics of negative crystals.