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Leucophosphite Pharmacosiderite Dufrénite & Arseniosiderite

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BCK664807

Leucophosphite Pharmacosiderite Dufrénite & Arseniosiderite

Kay Robertson collection
Rare Mineral

Description Tabs

Description
Locality: 
Lone Tree Mine, Buffalo Mountain, Humboldt County, Nevada, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.9 × 2.6 × 2.4 cm
Description

You are bidding on a fantastic specimen hosting numerous species. Tabular crystals of leucophosphite exist with green cubes of pharmacosiderite, bunches of arseniosiderite plates, black balls of dufrenite crystals, nice jarosite rhombs and small clusters of varicsite. One of the few localities where you can have phosphates, arsenates and sulfates existing all together! Very nice piece from the Kay Robertson collection. 

Mineral Data
What's on the rock

Leucophosphite

Formula: 
KFe3+2(PO4)2(OH)·2H2O
Strunz: 
8.DH.10
Hardness: 
3.5
Streak: 
White
Type Locality: 
Ninghanboun Hills serpentinite, Weelhamby Lake, Perenjori Shire, Western Australia, Australia

Pharmacosiderite

Formula: 
KFe3+4(AsO4)3(OH)4·6-7H2O
Strunz: 
8.DK.10
Hardness: 
2.5
Streak: 
white
Type Locality: 
Carharrack Mine, St Day United Mines (Poldice Mines), Gwennap, Camborne - Redruth - St Day District, Cornwall, England, UK

Dufrénite

Formula: 
Ca0.5Fe2+Fe3+5(PO4)4(OH)6·2H2O
Strunz: 
8.DK.15
Hardness: 
3.5 - 4.5
Streak: 
Green
Type Locality: 
Anglar, Haute-Vienne, Limousin, France

Arseniosiderite

Formula: 
Ca2Fe3+3(AsO4)3O2·3H2O
Strunz: 
8.DH.30
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Manganese deposit, Romanèche-Thorens, La Chapelle-de-Guinchay, Saône-et-Loire, Burgundy, France

Seller Information

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