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Holdenite
Type Locality
Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Mineral Data
(Mn
2+
,Mg)
6
Zn
3
(AsO
4
)
2
(SiO
4
)(OH)
8
Strunz:
8.BE.55
Physical Properties
Streak:
White
Hardness:
4.0
