A mineral of the apatite group now usually called carbonate-fluorapatite.
Origin
Mid 19th century. From the name of Wheal Franco, a former copper mine near Yelverton in south-west Devon, England, where the mineral was first identified + -lite.
Definition of francolite in US English:
francolite
nounˈfraŋkəlʌɪt
Mineralogy
A mineral of the apatite group now usually called carbonate-fluorapatite.
Origin
Mid 19th century. From the name of Wheal Franco, a former copper mine near Yelverton in south-west Devon, England, where the mineral was first identified + -lite.