Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Cordierite & Sillimanite

Views:
Watches:
CSL102132

Cordierite & Sillimanite

Description Tabs

Description
Locality: 
Androy Region, Tuléar Province, Madagascar
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1 × 0.8 cm
Description

Cordierite is a Mg-Al-silicate mineral, forms dark violet blue glassy mass with pale yellow fiborous sillimanite.
The pleochroism of cordierite is visible.

Mineral Data
What's on the rock

Cordierite

Formula: 
(Mg,Fe)2Al3(AlSi5O18)
Strunz: 
9.CJ.10
Crystal System: 
Orthorhombic
Hardness: 
7.0 - 7.5
Type Locality: 
Großer Arber, Bayerisch Eisenstein, Lower Bavaria, Bavaria, Germany

Sillimanite

Formula: 
Al2(SiO4)O
Strunz: 
9.AF.05
Crystal System: 
Orthorhombic
Hardness: 
6.5 - 7.5
Streak: 
white
Type Locality: 
Chester, Middlesex Co., Connecticut, USA

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Item Toolbox