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Axinite-(Fe) & Actinolite

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RMM513909

Axinite-(Fe) & Actinolite

Description Tabs

Description
Locality: 
New Melones Dam, Calaveras County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 1.5 × 1.5 cm
Description

Violet-grey crystals of axinite Fe or ferroaxinite are on a matrix of pale green actinolite and white albite. Much of the actinolite is in the form of pale green fibrous whiskers. 

For more information, consult The Mineralogical Record, Volume 13, Number 5, Pages 293-302.

Mineral Data
What's on the rock

Axinite-(Fe)

Formula: 
Ca2Fe2+Al2BSi4O15OH
Strunz: 
9.BD.20
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
St Christophe-en-Oisans, Bourg d'Oisans, Isère, Rhône-Alpes, France...

Actinolite

Formula: 
☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Strunz: 
9.DE.10
Crystal System: 
Monoclinic - Prismatic
Hardness: 
5.0 - 6.0
Streak: 
White

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