👉 Perthite is a mineral that occurs in the Earth's crust and is composed of iron, sulfur, and titanium. It is primarily found in igneous rocks such as granite and sedimentary rock formations, but it can also be found in metamorphic rocks like olivine and calc-iron oxide. The term "perthite" is often used to describe these minerals, although the exact meaning can vary depending on the specific type of perthite being referred to.
