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Sinkankasite Fluellite & Strengite

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BCK572421

Sinkankasite Fluellite & Strengite

Type Locality

Description Tabs

Description
Locality: 
Barker-Ferguson Mine, Keystone, Pennington County, South Dakota, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.6 × 3.3 × 2.8 cm
Description

You are bidding on an exceptional sample of sinkankasite with numerous white sprays of bladed crystals in a large quartz vug. Also associated are several small, colorless fluellite crystals and hundreds of strengite/variscite spheres. 

Mineral Data
What's on the rock

Sinkankasite

Formula: 
Mn2+Al(PO3OH)2(OH)·6H2O
Strunz: 
8.DB.20
Hardness: 
4.0
Type Locality: 
Barker-Ferguson Mine, Keystone, Keystone District, Pennington Co., South Dakota, USA

Fluellite

Formula: 
Al2(PO4)F2(OH)·7H2O
Strunz: 
8.DE.10
Crystal System: 
Orthorhombic
Hardness: 
3.0
Type Locality: 
Stenna Gwyn Mine (Stennagwyn Mine), Foxhole, St Stephen-in-Brannel, St Austell District, Cornwall, England, UK

Strengite

Formula: 
FePO4·2H2O
Strunz: 
8.CD.10
Hardness: 
3.5 - 4.0
Streak: 
white
Type Locality: 
Eleonore Mine, Rodheim-Bieber, Wetzlar, Hesse, Germany

Seller Information

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