Rock 366 : Day 226 : Silver Leaf with Calcite
Day 226 : Silver leaf with calcite from Blind River, Ontario, Canada. Cotton Collection, Keele.
Rock 366 : Day 225 : Kimberlite with Diamond.
Day 225 : Diamond in ‘Blue Ground’ (Kimberlite) matrix, South Africa. Cotton Collection, Keele.
Rock 366 : Day 224 : Electrum
Day 224 : Electrum (gold with silver) from Kongsberg, Norway. Cotton Collection, Keele.
Rock 366 : Day 223 : Native Gold on Quartz
Day 223 : Native gold on quartz. Locality unknown. Cotton Collection, Keele.
Rock 366 : Day 222 : Native Copper Pseudomorph
Day 222 : A native copper pseudomorph of aragonite, Keweenaw Peninsula, Michigan, United States. Cotton Collection, Keele.
Rock 366 : Day 221 : Lead Vein
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.
Rock 366 : Day 220 : Native Gold
Day 220 : Native gold in quartzite from near Johannesburg, South Africa. Cotton Collection, Keele.
Rock 366 : Day 219 : Native Copper
Day 219 : Native copper from Eagle River, Michigan on the shores of Lake Superior. Cotton Collection, Keele.
Rock 366 : Day 218 : Carn Llidi Gabbro
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.
Rock 366 : Day 217 : St David’s Head Microgabbro
Day 217 : The medium grained marginal part of the St David’s Head Gabbro, St David’s, Pembrokeshire, Wales.