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Dumortierite & Pyrophyllite

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RFJ929338

Dumortierite & Pyrophyllite

Classic Locality

Description Tabs

Description
Locality: 
Nasu-roseki Mine, Tochigi Prefecture, Honshu Island, Japan
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 6.3 × 2.7 cm
Description

Blue Dumortierite fine distributed in massive white Pyrophyllite.

Mineral Data
What's on the rock

Dumortierite

Formula: 
(Al,Fe3+)7(SiO4)3(BO3)O3
Strunz: 
9.AJ.10
Crystal System: 
Orthorhombic
Hardness: 
7.0 - 8.0
Type Locality: 
Ducarre's Quarry, Beaunant, Chaponost, Rhône, Rhône-Alpes, France...

Pyrophyllite

Formula: 
Al2(Si4O10)(OH)2
Strunz: 
9.EC.10
Hardness: 
1.0 - 2.0
Type Locality: 
Pyshminskoe deposit (Staro-Pyshminskoye), Berezovskoe Au Deposit (Berezovsk Mines), Berezovskii (Berezovskii Zavod), Ekaterinburg (Sverdlovsk), Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia...

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