👉 The term "gilbertite" is not commonly used or recognized in the field of crystallography, a branch of physics that deals with the properties and behavior of solid phases. However, it can be applied to a variety of minerals and crystals, including those found in the Earth's crust. In the context of mineralogy, "gilbertite" is often used to describe a type of quartz crystal, which is composed of two layers of pyroxene (a silicate) and
