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Hornblende In Albite With Zircon & Fassaite

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CLB93717

Hornblende In Albite With Zircon & Fassaite

Description Tabs

Description
Locality: 
Case Collina, Pitigliano, Grosseto Province, Tuscany, Italy
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 2.3 × 2.5 cm
Largest Crystal: 
0.70cm
Description

Arather big jet-black hornblende crystal in dirty-white albite with micro-crystals of zircon and fassaite.

Mineral Data
What's on the rock

Hornblende

Synonym Of: 

Ferro-hornblende

Formula: 
☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0

Magnesio-hornblende

Formula: 
☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Finnbo (Finbo), Falun, Dalarna, Sweden

Zircon

Formula: 
ZrSiO4
Strunz: 
9.AD.30
Crystal System: 
Tetragonal
Hardness: 
7.5
Streak: 
White

Fassaite

Variety Of: 

Augite

Formula: 
(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Strunz: 
9.DA.15
Hardness: 
5.5 - 6.0
Hardness: 
0.0

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