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Heulandite-Ca On Mordenite

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CR35154

Heulandite-Ca On Mordenite

Description Tabs

Description
Locality: 
Rats Nest Claim, Challis, Custer County, Idaho, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4 × 3.5 cm
Largest Crystal: 
2.20cm
Description

An aesthetic cluster of well defined extremely lustrous heulandite crystals perched on a mound of mordenite.

These crystals are so lustrous that it is very difficult to capture their true appearance in a photograph.

Mineral Data
What's on the rock

Heulandite-Ca

Formula: 
(Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Strathclyde (Dunbartonshire), Scotland, UK

Mordenite

Formula: 
(Na2,Ca,K2)Al2Si10O24·7H2O
Strunz: 
9.GD.35
Hardness: 
3.0 - 4.0
Streak: 
White
Type Locality: 
Morden, Bay of Fundy, Kings Co., Nova Scotia, Canada