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Truscottite & Thomsonite

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SMM942020

Truscottite & Thomsonite

Classic Locality

Description Tabs

Description
Locality: 
Bras de Cilaos, Cirque de Cilaos, Piton des Neiges, Reunion
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 1.2 cm
Description

The cavity of the volcanic rock matrix is filled with very thin and transparent tabular crystals of truscottite and prismatic thomsonite in which, three beautiful spherical groups of soft white crystals are nestled. Nice specimen.

Boxed with Label
Mineral Data
What's on the rock

Truscottite

Formula: 
(Ca,Mn)14Si24O58(OH)8·2H2O
Strunz: 
9.EE.35
Hardness: 
3.5 - 0.0
Type Locality: 
Lebong Donok Mine, Rejang Lebong District (Rediang Lebong District), Bengkulu Province (Benkoelen Province; Benkulen Province), Sumatera Island (Sumatra Island), Indonesia

Thomsonite

Synonym Of: 

Thomsonite-Ca

Formula: 
NaCa2[Al5Si5O20]·6H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 5.5

Thomsonite-Sr

Formula: 
Na(Sr,Ca)2[Al5Si5O20]·7H2O
Strunz: 
9.GA.10
Hardness: 
5.0 - 0.0

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