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Franklinite & Calcite

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GND107414

Franklinite & Calcite

Fluorescent

Description Tabs

Description
Locality: 
Buckwheat Mine, Franklin, Sussex County, New Jersey, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.2 × 3.5 × 3.7 cm
Description

Classic material from one of the world's most famous mining districts. This specimen consisting of greyoctahedral franklinite crystals to 5mm in a massive white calcite matrix. There is also some minor pink willemite.

This material fluoresces beautifully and is of good size and shape for a fluorescent cabinet display.

Mineral Data
What's on the rock

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White
Gondwana Minerals