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Day 226 : Silver leaf with calcite from Blind River, Ontario, Canada. Cotton Collection, Keele.

Day 225 : Diamond in ‘Blue Ground’ (Kimberlite) matrix, South Africa. Cotton Collection, Keele.

Day 224 : Electrum (gold with silver) from Kongsberg, Norway. Cotton Collection, Keele.

Day 223 : Native gold on quartz. Locality unknown. Cotton Collection, Keele.

Day 222 : A native copper pseudomorph of aragonite, Keweenaw Peninsula, Michigan, United States. Cotton Collection, Keele.

Day 221 : Out in the field in Ashover, Derbyshire. Someone had cleaned up an old quarry to build a house and exposed a small vein of galena.

Day 220 : Native gold in quartzite from near Johannesburg, South Africa. Cotton Collection, Keele.

Day 219 : Native copper from Eagle River, Michigan on the shores of Lake Superior. Cotton Collection, Keele.

Day 218 : Mapped as a separate intrusion to the St David’s Head sill, but probably the same intrusion folded in a tight syncline. Carn Llidi, St David’s, Pembrokeshire, Wales.

Day 217 : The medium grained marginal part of the St David’s Head Gabbro, St David’s, Pembrokeshire, Wales.