Volborthite is a copper-bearing sulfide mineral that occurs in shear zones of igneous rocks. It is classified as a secondary mineral, meaning it forms from the alteration of other existing minerals. Some synonyms for Volborthite include copper analogue, copper chalk, electric blue calcite, and blue copper. These names are often used in scientific literature and discussions about minerals and their properties. The distinctive electric blue color is one of the defining characteristics of this mineral. Volborthite is also used in various applications, including in the manufacture of semiconductors and catalytic converters. It is a fascinating mineral that has captured the attention of geologists and mineral collectors alike for many years.