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Tvedalite

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HEF681286

Tvedalite

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Description
Locality: 
Johs Nilsens Quarry, Tvedalen, Vestfold, Norway
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1 × 0.3 cm
Description

Beige tvedalite on matrix

Mineral Data
What's on the rock

Tvedalite

Formula: 
(Ca,Mn)4Be3Si6O17(OH)4·3H2O
Strunz: 
9.DF.20
Crystal System: 
Orthorhombic
Hardness: 
4.5
Streak: 
white
Type Locality: 
Vevja Quarry, Tvedalen, Larvik, Vestfold, Norway

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