Sapphire in Mullite

Loch Scridain, Isle of Mull, Scotland

1852

Loch Scridain on the Isle of Mull occasionaly produces sapphires this specimen being a fine example example. The sapphires, formed in pink Mullite, have good colour and whilst most are incomplete there are occasional whole crystals. Loch Scridain is the type locality for Mullite.

Formulas: Sapphire  Al2O3 ; Mullite AL4+2xSi2-2xO10-x  (x ~ 0.4)

Status: Sold

Dimensions: 70x50x22mm

Size: Small Cabinet (S)

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