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Corundum

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ALP714774

Corundum

Description Tabs

Description
Locality: 
Varallo Pombia, Novara Province, Piedmont, Italy
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4 × 2.5 cm
Description

A blue corundum in the variety sapphire found in the alluvial placers of the Ticino river and the obvious gouging that these pebbles assume in the light of the sun.

Mineral Data
What's on the rock

Corundum

Formula: 
Al2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
9.0
Streak: 
White

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