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Datolite & Apophyllite

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Datolite & Apophyllite

Ex Joachim Hennrich Collection
Classic Locality

Description Tabs

Description
Locality: 
Buco dell Inferno, Siusi Alp, South Tirol, Trentino-Alto Adige, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.6 × 2.9 × 2.3 cm
Description

This is a super-rare specimen from Seiser Alm,- a multifaced, transparent and highly lustrous crystal of datolite, accompanied by blady apophyllite on analcime. The apophyllite is very well developed and so far I can see perfect. Such specimens are so rare and sought that it is exceeding hard to get hold of such specimens. Ex Joachim Hennrich collection.

Mineral Data
What's on the rock

Datolite

Formula: 
Ca(HBSiO5)
Strunz: 
9.AJ.20
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Nødebro Mine (Nøddebro), Arendal Iron Mines, Arendal, Aust-Agder, Norway

Apophyllite

Synonym Of: 

Fluorapophyllite-(K)

Formula: 
KCa4(Si8O20)(F,OH)·8H2O
Strunz: 
9.EA.15
Hardness: 
4.5 - 5.0

Fluorapophyllite-(Na)

Formula: 
NaCa4(Si8O20)F·8H2O
Strunz: 
9.EA.15
Hardness: 
4.0 - 5.0

Hydroxyapophyllite-(K)

Formula: 
KCa4(Si8O20)(OH,F)·8H2O
Strunz: 
9.EA.15
Hardness: 
4.0 - 5.0
Wendel Minerals

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