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Franklinite

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GND29981

Description Tabs

Description
Locality: 
Sterling Mine, Ogdensburg, Sussex County, New Jersey, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 3.9 × 6.6 cm
Largest Crystal: 
1.00cm
Description

One of those must have minerals is Franklinite from this famous old mining district. This specimen features a 1cm well formed octahedral crystal nicely exposed in the calcite matrix. Other associated minerals include sphalerite and willemite.

Fluoresces beautifully and sits upright for display. Minor chipping to the large crystal but not seen when displayed.

Mineral Data
What's on the rock

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
Gondwana Minerals