👉 Tholeite is a chemical element that has the symbol Th and atomic number 15. It is often referred to as the "magnetic iron" because of its magnetic properties, which make it an essential component in various fields such as electronics, medicine, and construction. The term "tholeite" comes from the Greek word for "iron," which suggests that this element has a high degree of affinity with iron, which is a common material in tholeite.