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Quartz & Stilbite

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MEX149274

Quartz & Stilbite

ex Hermann Höger collection
Classic Locality

Description Tabs

Description
Locality: 
Landsverk #1 Feldspar Quarry, Evje og Hornnes, Agder, Norway
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.9 × 2.7 × 2.9 cm
Largest Crystal: 
2.50cm
Description

Cream colored quartz crystals with one stilbite group on green quartz. The color comes from kaolin and chlorite. The quartz is perfect, one group shows a laminated aggregat. One the peak of the largest quartz is a group of colorless stilbite.

Mineral Data
What's on the rock

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White