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Astrophyllite & Vlasovite

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CHP854865

Astrophyllite & Vlasovite

Classic Locality

Description Tabs

Description
Locality: 
Água de Pau Volcano, São Miguel Island, Azores District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 1.2 × 1.1 cm
Description

specimen with a beautiful orange crystal of astrophyllite with associate nice colourless adamantine crystals of vlasovite.

c. 2394

Mineral Data
What's on the rock

Astrophyllite

Formula: 
(K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7
Strunz: 
9.DC.05
Crystal System: 
Triclinic
Hardness: 
3.0
Streak: 
Golden
Type Locality: 
Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway

Vlasovite

Formula: 
Na2ZrSi4O11
Strunz: 
9.DM.25
Hardness: 
6.0
Type Locality: 
Vavnbed Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

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