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Jerrygibbsite

Type Locality
Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Mineral Data
Mn2+9(SiO4)4(OH)2
Strunz: 
9.AF.70
Physical Properties
Crystal System: 
Orthorhombic
Streak: 
Pale pink
Hardness: 
5.5
Tenacity: 
brittle