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Heulandite

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QRI1066757

Description Tabs

Description
Locality: 
Siusi Alp, South Tirol, Trentino-Alto Adige, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.1 × 5 × 3.2 cm
Largest Crystal: 
0.80cm
Weight: 
102.00gr
Description

Bow-tie and rosette-like aggregates of thick red heulandite blades beautifully contrast with the blue-green, celadonite-laden volcanic matrix from this classic locality. Very good lustre and quality for the locality.

A true Alpine classic. It comes from a couple decades old Italian colleciton, as the typewritten label in Italian confirms.
 

Pasted Label
Mineral Data
What's on the rock

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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Shipping Information

Postage Area Price
Italy (Pacco Celere 3)
10
Europe/Mediterranean Basin (Tracked; Zone 1)
15
Americas, Asia, Africa (Tracked; Zone 2)
20
Australia & Oceania (Tracked; Zone 3)
25

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