Spessartine is a type of garnet mineral that is rich in manganese. It typically appears in shades of orange to reddish-brown and is often found in metamorphic rocks. Spessartine is valued for its vibrant color and is used in jewelry, although it is less common than other garnet varieties. This mineral is commonly associated with other garnets, such as almandine and pyrope, and can be found in locations like Brazil, Madagascar, and the United States. Spessartine forms in high-temperature and high-pressure environments, making it an interesting subject for geologists studying metamorphic processes.