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Franklinite
Type Locality
Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA
Mineral Data
Zn
2+
Fe
3+
2
O
4
Strunz:
4.BB.05
Physical Properties
Colour:
Black
Crystal System:
Isometric
Hardness:
5.5 - 6.0
Tenacity:
very brittle
