What are tiny tension cracks in moonstone referred to as?

Tiny tension cracks in moonstone are referred to as "centipedes." This term specifically describes the appearance of these fine lines, which can resemble the body segments of a centipede. These cracks can form during the cooling process of the mineral or as a result of stress on the stone.

Understanding this terminology is important because recognizing centipedes can help in identifying the quality and characteristics of moonstone. This knowledge also aids gemologists and jewelers in evaluating the stone’s durability and suitability for various applications.