Corundum from North Atlantic Igneous Province
Greenland | |
| Melson, William G. and George Switzer (1966): Plagioclase-spinel-graphite xenoliths in metallic iron-bearing basalts, Disko Island, Greenland. American Mineralogist. 51: 664-676 |
Am Min 51:664-676 | |
UK | |
| [var. Sapphire] Day, Harry (1999) BMS Database, British Micromount Society. |
| |
| [var. Sapphire] |
[var. Sapphire] N L. Bowen, J W. Greig and E G. Zies. Mullite, a silicate of alumina. Jour | |
[var. Sapphire] |
Pennycross sapphire occurrence, Loch Scridain, Isle of Mull, Argyll and Bute, Scotland, UK