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Heulandite With Celadonite

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QRI827330

Heulandite With Celadonite

Former collection Kasper (CH)
Classic Locality

Description Tabs

Description
Locality: 
Siusi Alp, South Tirol, Trentino-Alto Adige, Italy
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10.4 × 7.5 × 3.5 cm
Largest Crystal: 
1.50cm
Weight: 
216.00gr
Description

Cabinet consisting of radial aggregates of red heulandite on top of celadonite-laden volcanic matrix. The zeolite has been extracted by dissolution with acids, which apparently has been done in a gentle manner, which resulted in very lustrous and undamaged crystals.

Quite rich, specimens of this size are oldtimers and only found in old collections. This one comes from the collection Kasper (CH), which is some 50 years old.

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

Celadonite

Formula: 
K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.0
Type Locality: 
Planitz, Zwickau, Saxony, Germany

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