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Hardystonite Willemite & Franklinite

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RMM105514

Hardystonite Willemite & Franklinite

Fluorescent

Description Tabs

Description
Locality: 
Franklin, Sussex County, New Jersey, United States of America
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 3 × 1.5 cm
Description

White hardystonite with grey willemite and steel black franklinite. The hardystonite fluoresces a dull violet under UV light, though it is upstaged by the strong green fluorescence of the willemite.

Mineral Data
What's on the rock

Hardystonite

Formula: 
Ca2Zn(Si2O7)
Strunz: 
9.BB.10
Hardness: 
3.0 - 4.0
Streak: 
white
Type Locality: 
Franklin Mine, Franklin, 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

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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