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Alleghanyite Franklinite & Sphalerite

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BCK655207

Alleghanyite Franklinite & Sphalerite

Ted Bartels collection
Rare Mineral

Description Tabs

Description
Locality: 
Sterling Mine, Ogdensburg, Sussex County, New Jersey, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.8 × 3.8 × 0.9 cm
Description

You are bidding on a small miniature specimen with a fracture surface hosting some very nice, sharp red crystals of alleghanyite on matrix with sharp secondary franklinite crystals, and one flat tetrahedron of sphalerite. Very good for the species! Ted Bartels collection from Ewald Gerstmann stock. 

Mineral Data
What's on the rock

Alleghanyite

Formula: 
Mn2+5(SiO4)2(OH)2
Strunz: 
9.AF.45
Crystal System: 
Monoclinic
Hardness: 
5.5
Type Locality: 
Bald Knob, Sparta, Alleghany County, North Carolina, United States of America

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

Sphalerite

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

Seller Information

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