Rock 366 : Day 336 : Colemanite
Day 336 : Colemanite (hydrated calcium borate). Locality unknown. Cotton collection, Keele.
Rock 366 : Day 335 : Fluorite and Dolomite
Day 335 : Fluorite and dolomite from the Harz Mountains of Germany. Cotton collection, Keele.
Rock 366 : Day 334 : Hambergite
Day 334 : Hambergite (anhydrous beryllium borate) from Madagascar. Cotton collection, Keele.
Rock 366 : Day 333 : Plattnerite
Day 333 : Plattnerite (lead oxide) from Mapimi, Mexico. Cotton collection, Keele.
Rock 366 : Day 332 : Quartz Pseudomorph After Fluorite
Day 332 : Quartz pseudomorph after fluorite from Transylvania, Romania. Cotton collection, Keele.
Rock 366 : Day 331 : Pandermite
Day 331 : Pandermite (or more correctly Priceite), a hydrated calcium borate, named after Panderma (now Bandirma) in Balikesir province, Turkey.
Rock 366 : Day 330 : Hollandite
Day 330 : Hollandite (barium manganese oxide) from its type locality, Kajlidongri mine, Jhabua District, Madhya Pradesh, India. Cotton collection, Keele.
Rock 366 : Day 329 : Opal in Ironstone
Day 329 : Opal in ironstone from Queensland, Australia. Cotton collection, Keele.
Rock 366 : Day 328 : Samarskite
Day 328 : Samarskite (a yttrium – niobium (amongst other things) oxide) probably from the type localitiy Miass (Miask), Ilmen Mts, Chelyabinsk Oblast, Southern Urals, Russia. Cotton collection, Keele.
Rock 366 : Day 327 : Albite and Brookite
Day 327 : Albite with Brookite from Twll Maen Grisial, Fron Olau, Prenteg, Gwynedd, Wales. Cotton collection, Keele.