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Sapphire & Mullite

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UVM872143

Sapphire & Mullite

Type Locality

Description Tabs

Description
Locality: 
Loch Scridain, Isle of Mull, Scotland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 1.9 × 0.9 cm
Description

Blue microcrystals of sapphire in matrix with pinkish mullite.   From the type locality for the latter.

Mineral Data
What's on the rock

Sapphire

Variety Of: 

Corundum

Formula: 
Al2O3
Strunz: 
4.CB.05
Hardness: 
9.0
Formula: 
Al2O3
Hardness: 
0.0

Mullite

Formula: 
Al4+2xSi2-2xO10-x
Strunz: 
9.AF.20
Crystal System: 
Orthorhombic
Hardness: 
6.0 - 7.0
Type Locality: 
Seabank Villa, Isle of Mull, Strathclyde (Argyllshire), Scotland, UK

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