Day 112 : Celestine (strontium sulphate) from Somerset. Keele Collection

Day 111 : Daisy Gypsum, Kirkby Thore, Cumbria. Keele Collection

Day 110 : Barytes, from the Silverband Mine, Dun Fell, Milburn, Cumbria. Keele Collection.

Day 109 : Barytes from the Settlingstones Mine, Northumberland. Cotton Collection, Keele.

Day 108 : This is volcanic ash from the Eyjafjallajökull eruption in Iceland on the bonnet of my car in England this morning.

Day 107 : From my own collection, this is a mylonitised limestone from the Spanish Pyrenees.

Day 106 : Turquoise, from Gunheath China Clay Pits, St Austell, Cornwall. Cotton Collection, Keele

Day 105 : Colemanite, a borate mineral, here from Boron, California. Cotton Collection, Keele.

Day 104 : Glauconite, an iron potasssium phyllosilicate indicative of shallow marine conditions. From Cyprus. Cotton collection, Keele

Day 103 : Absite, Crocker’s Well, Plumbago homestead, Olary Province,South Australia. A Titanium, Uranium, Thorium Oxide (!!!). Cotton collection, Keele.