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Harmotome

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CR67446

Harmotome

Description Tabs

Description
Locality: 
Korsnäs Mine, Korsnäs, Ostrobothnia, Finland
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4.5 × 2 cm
Largest Crystal: 
0.70cm
Description

Gemmy, greenish apophyllite crystals are richly concentrated or are scattered amongst sharp, pearlescent, greyish-white harmotome crystals. The harmotome crystals reach 0.7 cm.

Ex Prof. Gösswein collection, Germany

Mineral Data
What's on the rock

Harmotome

Formula: 
(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] ·12H2O
Strunz: 
9.GC.10
Crystal System: 
Monoclinic
Hardness: 
4.0 - 5.0
Streak: 
White
Type Locality: 
St Andreasberg, St Andreasberg District, Harz, Lower Saxony, Germany