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Fayalite Sphalerite & Franklinite

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BCK787636

Fayalite Sphalerite & Franklinite

William Roepper collection
Classic Locality

Description Tabs

Description
Locality: 
Sterling Hill, Ogdensburg, Sussex County, New Jersey, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 7.2 × 5.3 cm
Description

You are bidding on a large sample of 'roepperite' or zincian-fayalite from Sterling Hill as large, rounded crystals with dozens of small green sphalerite crystals, and massive franklinite. This is a sample from the William Roepper, John McDonald and LeHigh University collections. Great provenance, with several labels attached to the bottom of the sample. 

Mineral Data
What's on the rock

Fayalite

Formula: 
Fe2+2SiO4
Strunz: 
9.AC.05
Crystal System: 
Orthorhombic
Hardness: 
7.0
Type Locality: 
Faial Island (Fayal Island), Azores District, Portugal

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

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

Seller Information

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