Fluorite on Quartz Minerals 12:52 PM A+ A- Print Email Fluorite | #Geology Formula: CaF2 System: Isometric Hardness: 4 Colour: various Purple, lilac, ... Lustre: Vitreous, Dull From: Berbes Mining area, Ribadesella, Asturias, Spain Photo : © (FH) Rudolf Watzl