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Arfvedsonite With Microcline

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FCM766180

Arfvedsonite With Microcline

Fluorescent

Description Tabs

Description
Locality: 
Washington Pass, Okanogan County, Washington, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
3.5 × 6.1 × 5.3 cm
Largest Crystal: 
1.50cm
Description

Jet black slender crystals of arfvedsonite to 1.5 cm on a contrasting lustous white matrix of stepped microcline crystals from a locality in the heart of the N. Washington Cascade Mountains.  The microcline fluoresces deep red under SW UV. 

Previous labels supplied (not photographed)
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

Microcline

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Triclinic - Pinacoidal
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Arendal, Aust-Agder, Norway

Seller Information

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