Home > Borate Minerals – April 22 > MS1803 Fluoborite

Fluoborite - Sold


Fluoborite is a magneisum borate fluoride. Geijer (1926) named the species for its contents of fluorine and boron.

Pete Dunn describes fluoborite form Sterling Hill in his magnum opus Franklin and Sterling Hill. New Jersey: the World's Most Magnificent Mineral Deposits. Notably he records fibers to 5 cm. This must be an exceptional example; here the fibers reach 6.0 cm! This specimen was part of the collection of Rudolph Kluiber (1930-2020), professor of chemistry at Rutgers University. Material from Kluiber's collection appeared at 2021 Tucson events in January-February. A typed label dates this specimen to 1979 and indicates confirmation by X-ray diffraction.