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Actinolite Var Byssolite

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DVE111393

Actinolite Var Byssolite

Ex-David J. Eicher Collection

Description Tabs

Description
Locality: 
Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania, United States of America
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.9 × 2.9 × 1.8 cm
Description

An unusual specimen of byssolite with numerous parallel, greenish, hairlike crystals emanating from a chunk of country rock. Scarce and really unusual!

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

Byssolite

Variety Of: 

Amphibole Supergroup

Formula: 
AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hardness: 
0.0
Hardness: 
0.0
David J. Eicher

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