Rock 366 : Day 326 : Amethyst
Day 326 : Amethyst from Uraguay. Cotton collection, Keele.
Rock 366 : Day 325 : Menilite
Day 325 : Menilite or ‘liver opal’. Locality unkown. Cotton collection, Keele.
Rock 366 : Day 324 : Black Opal
Day 324 : Black opal probably from from Mintabie, South Australia. Cotton collection, Keele.
Rock 366 : Day 323 : Kyanite
Day 323 : Kyanite (aluminium silicate). Locality unknown. Cotton collection, Keele.
Rock 366 : Day 322 : Cuprite in Limonite
Day 322 : Cuprite (copper oxide) in limonite from Spring Hill, Glenorchy homestead, Olary Province, South Australia, Australia. Cotton collection, Keele.
Rock 366 : Day 321 : Brookite
Day 321 : Brookite (titanium oxide) from Twll Maen Grisial, Fron Olau, Prenteg, Gwynedd, Wales. Cotton collection, Keele.
Rock 366 : Day 320 : Magnetite
Day 320 : Magnetite from Magnet Cove, Arkansas, United States. Cotton collection, Keele.
Rock 366 : Day 319 : Valentinite
Day 319 : Valentinite (antimony oxide). Locality unknown. Cotton collection, Keele.
Rock 366 : Day 318 : Cassiterite Pseudomorph
Day 318 : Cassiterite pseudomorph after orthoclase from Wheal Coates, St Agnes, Cornwall, England. Cotton collection, Keele.
Rock 366 : Day 317 : Wood Tin
Day 317 : Wood Tin, a variety of cassiterite (tin oxide) from Bojewan Placers, Sancreed, St Just District, Cornwall, England, UK. Cotton collection, Keele.