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Corundum

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JYJ720454

Corundum

Description Tabs

Description
Locality: 
Krucze Rocks, Karpacz, Jelenia Góra County, Lower Silesian Voivodeship, Poland
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 4.3 × 2.6 cm
Description

Pale red corundum var. ruby and the bluish variety sapphire on granite-mica matrix from Silesia. Comes with a historic machine-written label. 

 

Mineral Data
What's on the rock

Corundum

Formula: 
Al2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
9.0
Streak: 
White
Labels
Label Images - only: Corundum