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Helvine

Type Locality
Friedefürst Mine, Breitenbrunn, Breitenbrunn District, Erzgebirge, Saxony, Germany
Mineral Data
Mn2+4(Be3Si3O12)S
Strunz: 
9.FB.10
Physical Properties
Crystal System: 
Isometric
Streak: 
White
Hardness: 
6.0 - 6.5
Tenacity: 
brittle
Synonyms
Synonyms: 
Helvite and Helvin
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