Erythrite is a mineral that belongs to the arsenate mineral group. It is characterized by its bright pink to purple color. However, there are several other names or synonyms for erythrite depending on the region or context. Some of these synonyms include cobalt bloom, red cobalt, red nickel, and cobaltine. Other regional names for this mineral include Arizona erythrite, safflorite, and cobalt pyrite. In some cases, erythrite may also be referred to as arseniosiderite or annabergite. These synonyms are important in the geological world because they help geologists and mineralogists to identify and classify this rare and valuable mineral.