Hoganite is a mineral found in iron oxide-copper-gold deposits. Its spelling is interesting because it contains a silent "g" which is a result of the word's origin in the name of a person, Hogan. Hoganite is pronounced /ˈhoʊɡənaɪt/, with the "g" being silent and "o" being pronounced with a long "o" sound. This mineral has been discovered in various locations around the world, including the United States, Argentina, and Australia, and is valued by many for its unique properties.
Hoganite is a noun that refers to a rare mineral predominantly composed of hydrated copper sulfate. It belongs to the monoclinic crystal system with a chemical formula of Cu5(SO4)2(OH)6. Hoganite typically forms as a secondary mineral in the oxidation zone of copper deposits, where it occurs as encrustations, nodules, or stalactitic masses.
In terms of physical properties, hoganite is commonly characterized by its vibrant blue color, although it can occasionally be green or light green. It has a vitreous to dull luster and a light blue streak. Hoganite exhibits a hardness ranging from 2.5 to 3 on the Mohs scale, making it relatively soft. Its specific gravity is approximately 3.9, indicating a higher density than most common minerals.
The name "hoganite" was derived from the Hogan Mine in the United States, specifically in Arizona, where the mineral was first discovered. Due to its rarity and limited occurrence worldwide, hoganite primarily serves as a collector's mineral rather than having any significant industrial applications. On occasion, it may be used as a decorative stone in jewelry, especially in pieces that highlight its vibrant blue color.
In summary, hoganite is a rare mineral composed of hydrated copper sulfate, known for its vivid blue color. It forms as a secondary mineral in copper deposits and is primarily valued for its aesthetic appeal among mineral collectors.