👉 Gemmological refers to a branch of mathematics that deals with the study and application of mathematical concepts related to the properties of gemstones. It is a part of the field of crystallography, which is concerned with understanding the structure, size, and composition of crystals. In the context of gemmology, a gemstone's texture (or "gem") can be defined as its physical properties that determine its appearance and quality. For example, a diamond is considered to have a high degree