Fluorite from Cave-in-Rock, USA

USA deep-blue purple fluorite

 Exceptional colorful and double-sided piece!
 Museum specimen!
 Piece for discerning collectors .
 Ideal for connoisseurs looking for Fluorites of Excellence .
 It deserves its place in the most refined collections or the most prestigious showcases .
 
Provenance: Minerva Mine, Cave-in-Rock, Hardin County, Illinois, USA
Size: 18 cm by 11 cm by 7 cm for 1kg830
Chemical formula: CaF2
Crystal system: Cubic
Hardness Mohs scale: 4
 
 Definition:
 Fluorite (or fluorite ) is amineral species composed of calcium fluoride . The different trace ions are at the origin of the multiple colors and colored zonations encountered for this mineral .