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Gismondine & Chabazite-Ca

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PAV863347

Gismondine & Chabazite-Ca

New Discovery

Description Tabs

Description
Locality: 
Fajã Escura, Curral das Freiras, Câmara de Lobos, Madeira Islands, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 3.1 × 2.7 cm
Description

Very nice gismondine-Ca crystals associated to twinned chabazite-Ca.

New discovery!

First and only locality in Portugal!

Extremely rare!

Collected: 
2020
Boxed with Label
Mineral Data
What's on the rock

Gismondine

Synonym Of: 

Gismondine-Ca

Formula: 
CaAl2Si2O8·4H2O
Strunz: 
9.GC.05
Hardness: 
0.0
Group Parent: 
Zeolite Group

Chabazite-Ca

Formula: 
(Ca,K2,Na2)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 5.0
Streak: 
White
Type Locality: 
Colle del Lares, San Nicolò Valley, Buffaure Group, Fassa Valley, Trento Province, Trentino-Alto Adige, Italy