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K Feldspar Var Adularia

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JJH871006

K Feldspar Var Adularia

Self collected
Pseudomorph

Description Tabs

Description
Locality: 
Pol Cornic, Predannack, Mullion, Cornwall, United Kingdom
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
2.2 × 6 × 3 cm
Largest Crystal: 
0.30cm
Weight: 
9.00gr
Description

Sharp pink crystals of Orthoclase feldspar, var. adularia encrust what was originally a group of natrolite crystals.

The adularia crystals essentially forming an epimorph on the once present natrolite.

An unusual and rare example.

Collected: 
28/08/1993
Mineral Data
What's on the rock

K Feldspar

Synonym Of: 

Microcline

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0 - 6.5

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0

Sanidine

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0

Adularia

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Monoclinic
Hardness: 
6 Ortho - clase

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