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Oligoclase

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DVE92417

Oligoclase

Ex-David J. Eicher Collection; ex-John H. Eicher Collection

Description Tabs

Description
Locality: 
Tvedestrand, Agder, Norway
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 4.8 × 2.7 cm
Description

Old-time specimen of reddish, transulcent albite, var. oligoclase, from an unusual Norwegian locality and from an old collection.

Acquired in the 1940s.

Mineral Data
What's on the rock

Oligoclase

Variety Of: 

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Hardness: 
6.0 - 6.5
Formula: 
(Na,Ca)[Al(Si,Al)Si2O8]
Strunz: 
9.FA.35
Hardness: 
6.0 - 6.5
Streak: 
White
David J. Eicher

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