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Holdenite & Allactite

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BCK797524

Holdenite & Allactite

Steven Phillips collection
Type Locality

Description Tabs

Description
Locality: 
Sterling Mine, Ogdensburg, Sussex County, New Jersey, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 0.8 × 0.6 cm
Description

You are bidding on a small sample with rough crystalline, bright pink holdenite as the matrix for some small brown bladed clusters of allactite crystals. From the Steve Phillips collection of Franklin District micromounts and rarities. 

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

Allactite

Formula: 
Mn2+7(AsO4)2(OH)8
Strunz: 
8.BE.30
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Moss mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden

Seller Information

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