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Franklinite

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CR181202

Franklinite

Description Tabs

Description
Locality: 
Sterling Mine, Ogdensburg, Sussex County, New Jersey, United States of America
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 8.5 × 5.5 cm
Largest Crystal: 
3.80cm
Description

Old-time specimens like this are getting scarce. This specimen is highlighted by large, black, octahedrons of franklinite, with matte luster. The crystals measures up to 3.8 cm in length, and is perched high on a matrix of franklinite, zincite, and fluorescent calcite and willemite.

Ex Armin Wendland collection - acquired 1986

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