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Smoky Quartz Stilbite & Adularia

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MGR626601

Smoky Quartz Stilbite & Adularia

Description Tabs

Description
Locality: 
Innergschlöss, Tauern Valley, East Tyrol, Tyrol, Austria
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
10.1 × 6.9 × 5.7 cm
Description

This specimen represents an outstanding rarity! First of all - the locality is very rare, field collecting is prohibited in this area and there is only a very low number of specimen on the market. Discoveries are very rare! The second important indicator is the combination of minerals - stilbite from Alps is really exceptional! It covers the top of some crystals, finally a sharp terminated, lustrous adularia crystal is attachted. The smoky quartz crystals are partly glossy, sharp terminated and very clear. With minor backlight (second photo in the gallery) they show a brown-yellow color. No significant damages to report, base was on the rock.

Mineral Data
What's on the rock

Smoky Quartz

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Formula: 
SiO2
Hardness: 
0.0

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

Adularia

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