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Troostite & Franklinite

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SER720274

Troostite & Franklinite

Description Tabs

Description
Locality: 
Sterling Hill, Ogdensburg, Sussex County, New Jersey, United States of America
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.1 × 1.5 × 1.5 cm
Description

Brick red crystalline troostite with black grains of franklinite

Mineral Data
What's on the rock

Troostite

Variety Of: 

Willemite

Formula: 
Zn2SiO4
Strunz: 
9.AA.05
Hardness: 
5.5
Formula: 
(Zn,Mn)2SiO4
Hardness: 
0.0

Franklinite

Formula: 
Zn2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.0
Colour: 
Black
Type Locality: 
Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA