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Franklinite With Zincite

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LGM114635

Franklinite With Zincite

Ex Dr. Krantz, Bonn, Germany, Ex Charles Ottley Groom-Napier
Type Locality

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Description Tabs

Description
Locality: 
Franklin, Sussex County, New Jersey, United States of America
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 4 × 2.5 cm
Description

Rough, partly crystalline black franklinite (member of spinel group) with red zincite.
With small Museum M&M (Charles Ottley Groom-Napier / Mantua & Monferrat) label, dated between 1850 and 1890.
No significant fluorescence.
Weight: 80 grams

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

Zincite

Formula: 
(Zn,Mn2+,Fe2+)O
Strunz: 
4.AB.20
Crystal System: 
Hexagonal
Hardness: 
4.0
Type Locality: 
Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA

Seller Information

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