Day 322 : Nepheline syenite from Red Hill, New Hampshire, USA. Keele collection.

Day 321 : Appinite (hornblende & feldspar rich igneous rocks) probably from Scotland. Keele collection.

Day 320 : This is a eudialyte syenite. Eudialyte is a rare red-purple cyclosilicate whose name means “readily decomposible” as it disolves easily in acids. This sample from Norra Kärr, Gränna, Jönköping, Småland, Sweden. Keele collection.

Day 319 : A nepheline syenite from the Ikka-Grønnedal complex, south Greenland. Keele collection.

Day 318 : An andesite from Meldon Quarry, Devon, England. Keele collection.

Day 317 : A banded quartz-andesite from Penmaenmawr, North Wales. Keele collection.

Day 316 : A Miocene andesite from the site of the Çubuk-1 Dam, north of Ankara, Turkey. Keele collection.

Day 315 : Amygdaloidal andesite from Red Head, Arbroath, Angus, Scotland. Keele collection.

Day 314 : Banded andesite from Craig Rossie, Auchterarder, Perth, Scotland. Keele collection.

Day 313 : Hornblende porphyritic andesite from Dolgellau, Gwynedd, North Wales. Keele collection.