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Ezcurrite

Type Locality
Tincalayu Mine, Salar Del Hombre Muerto, Salta, Argentina
Mineral Data
Na4B10O17·7H2O
Strunz: 
6.EB.10
Physical Properties
Colour: 
Colorless
Hardness: 
3.0 - 3.5
Tenacity: 
brittle