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Sellaite

Type Locality
Gébroulaz glacier, Val Thorens, Savoie, Rhône-Alpes, France
Mineral Data
MgF2
Strunz: 
3.AB.15
Physical Properties
Crystal System: 
Tetragonal
Streak: 
White
Hardness: 
5.0 - 5.5
Tenacity: 
brittle