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Mesolite & Heulandite

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CSW139377

Mesolite & Heulandite

ex Roland Fogg Collection - Collected in 1967

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Description Tabs

Description
Locality: 
Big Tree Creek, Yacolt, Clark County, Washington, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
1.1 × 1.1 × 0.5 cm
Description

Half of an amygdale lined with transparent micro heulandite crystals and filled with white hair-like mesolite crystals with a single calcite crystal at their centre.

Mineral Data
What's on the rock

Mesolite

Formula: 
Na2Ca2Si9Al6O30·8H2O
Strunz: 
9.GA.05
Hardness: 
5.0

Heulandite

Synonym Of: 

Heulandite-Ba

Formula: 
(Ba,Ca,K,Na,Sr)5Al9Si27O72·22H2O
Strunz: 
9.GE.05
Hardness: 
3.5

Heulandite-Ca

Formula: 
(Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.5 - 4.0

Heulandite-K

Formula: 
(K,Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5

Heulandite-Na

Formula: 
(Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5

Heulandite-Sr

Formula: 
(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5
Hardness: 
3 - 3.5
Colour: 
White
Streak: 
White

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