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Seamanite & Shigaite & Pyrobelonite

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AMM1002857

Seamanite & Shigaite & Pyrobelonite

Rare Mineral

Description Tabs

Description
Locality: 
Iron Monarch Open Cut, Iron Knob, Middleback Range, Eyre Peninsula, South Australia, Australia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 1.5 × 1.4 cm
Description

Fine specimen with a light rose coloured seamanite crystal-aggregate. In association with strong yellow six-sided shigaite crystals and minor dark red pyrobelonite crystals.

Seamanite is only known from six localities worldwide. Very rare mineral and in association with some other interesting minerals.

Mineral Data
What's on the rock

Seamanite

Formula: 
Mn2+3[B(OH)4](PO4)(OH)2
Strunz: 
6.AC.65
Crystal System: 
Orthorhombic Small acicular crystals.
Hardness: 
4.0
Streak: 
White
Type Locality: 
Chicagon mine, Menominee iron range, Iron Co., Michigan, USA

Shigaite

Formula: 
Mn6Al3(OH)18[Na(H2O)6][SO4]2·6H2O
Strunz: 
7.DD.35
Hardness: 
0.0
Type Locality: 
Ioi mine, Ritto City, Shiga Prefecture, Kinki Region, Honshu Island, Japan

Pyrobelonite

Formula: 
PbMn2+(VO4)(OH)
Strunz: 
8.BH.40
Hardness: 
3.5
Type Locality: 
Långban, Filipstad, Värmland, Sweden

Seller Information

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Money back guarantee is valid until 14 days after receiving the payment. The refund will be initiated immediately upon receiving the minerals back. Due to the return time, there may be a delay in the refund.