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Willemite Franklinite & Zincite

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PDM801396

Willemite Franklinite & Zincite

Fluorescent

Description Tabs

Description
Locality: 
Franklin, Sussex County, New Jersey, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 5.2 × 2.8 cm
Description

Brown willemite crystals with good black franklinite and red zincite, in a matrix of white calcite, a classic combination from Franklin. Willemite crystals display a very intense green fluorescence under Short UV light.

Ex Luciaan Vandoorne #271

Mineral Data
What's on the rock

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

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

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