👉 The term "unmetamorphic" is a technical term in the field of mineralogy and crystallography, referring to a crystal that remains unchanged under mechanical or thermal treatments. It is often used in the context of metamorphic rocks, which are formed when igneous materials undergo cooling, pressure, or heat treatment. In this sense, "unmetamorphic" refers to a rock that has not undergone any physical or chemical changes during its formation, and therefore remains essentially unchanged under these