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Krausite

Type Locality
Sulphur Hole (Sulfur Hole; Sulphur pit), Mule Canyon, Yermo, Calico District (Daggett District), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Mineral Data
KFe(SO4)2·H2O
Strunz: 
7.CC.05
Physical Properties
Crystal System: 
Monoclinic
Streak: 
White
Hardness: 
2.5
Tenacity: 
brittle