Opaque and ore minerals associated with intermediate and acid igneous rocks
Albitites associated with biotite granite. Ririwai, Nigeria.
El Salvador, Chile
Glen Gairn diorite. Scotland, Britain
Glen Gairn granite. Scotland, Britain
Greisen. Ririwai, Nigeria
Henderson Mine, Colorado, USA
Los Bronces, Chile
Microclinized granite. Ririwai, Nigeria
Mount Pleasant, New Brunswick, Canada
Newry granodiorite. County Down, Northern Ireland
Quartz veins. Ririwai, Nigeria.
Quartz-sulphide veins associated with granites. Jersey, Channel Islands, Britain.