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Tourmaline With Goethite Psm Siderite

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PCZ694469

Tourmaline With Goethite Psm Siderite

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
15 × 8.5 × 4.5 cm
Description

A large specimen with sharp reflective schorl crystals (up to 1.3cm in length), and goethite psm. siderite crystals (u to 2.0c across) contrasting well with a white matrix. A great display that sits nicely on its own.

Mineral Data
What's on the rock

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Crystal System: 
Trigonal
Hardness: 
7

Goethite

Formula: 
α-Fe3+O(OH)
Strunz: 
4.00.
Crystal System: 
Orthorhombic
Hardness: 
5.0 - 5.5
Type Locality: 
Hollertszug Mine (Hollerter Zug Mine), Dermbach, Herdorf, Siegerland, Rhineland-Palatinate, Germany

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White
Peter Crozier Minerals

Current price

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Starting price

$59
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Shipping Information

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$7