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Actinolite In Quartz

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PDM840065

Actinolite In Quartz

Classic Locality

Description Tabs

Description
Locality: 
Miage Glacier, Veny Valley, Monte Bianco, Courmayeur, Aosta Valley, Italy
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.1 × 1.7 × 1.2 cm
Description

Transparent doubly-ended quartz crystal richly included by acicular green actinolite, and some chlorite crystals in the areas at the contact with the matrix.

Acquired in 1980, Ex Gerard Vogel specimen.

Mineral Data
What's on the rock

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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