Rogerley Fluorite is from a mine of the same name located in an abandoned 19th century limestone quarry in the region of the village of Frosterly in the historic Weardale mining district of northern England. The famous mine was discovered in the early 1970's by partners Lindsay Greenbank and Mick Sutcliffe. It is the only mine in the United Kingdom operated solely to commercially provide fine mineral specimens to collectors.
Fluorite from the Rogerley mine commonly occurs as penetration twins and crude or corroded octahedral Galena crystals small to over 1 cm often accompany the Fluorite. Rogerley Fluorite is well known for its intense blue to purple fluorescence in daylight. This fluorescence is generally attributed to traces of rare earth elements, such as lanthanum, cerium and yttrium, in the crystalline structure.
