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Arfvedsonite & Orthoclase

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CR15380

Arfvedsonite & Orthoclase

Description Tabs

Description
Locality: 
Mount Malosa, Zomba, Southern Region, Malawi
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.3 × 5.7 × 3 cm
Description

Dark green arfvedsonite crystals on orthoclase.

Mineral Data
What's on the rock

Arfvedsonite

Formula: 
[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Strunz: 
9.DE.25
Hardness: 
5.0 - 6.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0
Streak: 
White