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Hancockite
Type Locality
Parker Mine (Parker shaft), Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Mineral Data
{CaPb}{Al
2
(Fe
3+
,Mn
3+
)}(Si
2
O
7
)(SiO
4
)O(OH)
Variety Of:
Epidote-(Pb)
Physical Properties
Streak:
White
Hardness:
6.0 - 7.0
Tenacity:
brittle
