Richterite is a rare mineral that belongs to the amphibole group. It is named after the German mineralogist, Friedrich Richter who discovered it in the 19th century. Some synonyms for richterite include blue amphibole, wernicite, and ferropargasite. Blue amphibole refers to the characteristic blue color of richterite, which is caused by the presence of iron in its crystal structure. Wernicite is another synonym for richterite, which was named in honor of the mineral collector, Johann Anton von Wernicke. Ferropargasite is also a synonym for richterite, which describes the high iron content in its composition. Despite its rarity, richterite has become an important mineral in gemology due to its intriguing color and unique crystal structure.