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Forsterite Nepheline Biotite & Hornblende

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NST655333

Forsterite Nepheline Biotite & Hornblende

Dipl.-Ing. W. Maucher, Munich
With Antique Label

Description Tabs

Description
Locality: 
Mount Vesuvius, Campania, Italy
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 8 × 5.5 cm
Description

Hand sized ejection bloc from Monte Vesuvius hosting forsterite, nepheline, biotite and hornblende. Comes with an early 20th century handwritten label of Dipl. Ing. Wilhelm Maucher, Munich.

Mineral Data
What's on the rock

Forsterite

Formula: 
Mg2SiO4
Strunz: 
9.AC.05
Crystal System: 
Orthorhombic
Hardness: 
7.0
Streak: 
White
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Nepheline

Formula: 
(Na,K)AlSiO4
Strunz: 
9.FA.05
Hardness: 
5.5 - 6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Biotite

Group Parent: 
Mica Group

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
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