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Gismondine Psm Calcite

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GMN775593

Gismondine Psm Calcite

Description Tabs

Description
Locality: 
Uzsa, Tapolca, Veszprém County, Hungary
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.4 × 1 cm
Description

White-translucent gismondite crystals after calcite or aragonite crystal.

Really rare, one-time find.

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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