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Holdenite Franklinite & Willemite

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JYJ74058

Holdenite Franklinite & Willemite

ex. R. Feigl

Description Tabs

Description
Locality: 
Sterling Mine, Ogdensburg, Sussex County, New Jersey, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 1.8 × 1.7 cm
Description

Pink colored holdenite with typical brown willemite and some franklinite crystale.

Mineral Data
What's on the rock

Holdenite

Formula: 
(Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8
Strunz: 
8.BE.55
Hardness: 
4.0
Streak: 
White
Type Locality: 
Franklin, Franklin Mining District, Sussex Co., New Jersey, USA

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

Willemite

Formula: 
Zn2SiO4
Strunz: 
9.AA.05
Hardness: 
5.5
Streak: 
White
Type Locality: 
Vieille Montagne (Altenberg; Kelmisberg), Moresnet, Kelmis, Plombières-Vieille Montagne District (Plombières-Altenberg), Verviers, Liège Province, Belgium