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Hancockite

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Hancockite

Classic Locality

Description Tabs

Description
Locality: 
Franklin, Sussex County, New Jersey, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2 × 1.5 cm
Description

Dark brick red crystal aggregates of the rare mineral hancockite from the famous Franklin deposit and associted to golden brown andradite

Only 4 known localities worldwide !

Ex Vandenbroucke Museum collection from Waregem, Belgium.

Mineral Data
What's on the rock

Hancockite

Variety Of: 

Epidote-(Pb)

Formula: 
{CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05
Hardness: 
6.0 - 7.0
Formula: 
{CaPb}{Al2(Fe3+,Mn3+)}(Si2O7)(SiO4)O(OH)
Hardness: 
6.0 - 7.0
Streak: 
White
Type Locality: 
Parker Mine (Parker shaft), Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA

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