Sapphire (Var. of corundum)

Reference: 429

Loch Scridain on the Isle of Mull occasionaly produces sapphire specimens this being a particularly fine and large example with a little pale pink matted crystals of Mullite (as in picture 4) and darker spinels.   The sapphire have good colour and whilst most are incomplete there are occasional whole crystals.   Also a few small cavities of a zeolite.  Loch Scridain is the type locality for Mullite

Formulas: Sapphire  Al₂O_{3 ;} Mullite AL_4+2xSi_2-2xO_10-x  (x ~ 0.4)

Status: Sold

Dimensions: 90x60x65mm

Size: Small Cabinet (S)