Day 356 : Corundum (ruby) from Merkerstein, Tanzania. Cotton collection, Keele.

Day 355 : Cuprite from Wheal Phoenix, Linkinhorne, Cornwall, England. Cotton collection, Keele.

Day 354 : Rutile from Champion Mine, Laws, Mono County, California, United States.  Cotton collection, Keele.

Day 353 : Rutile (titanium oxide) from Rauris, Salzburg, Austria. Cotton collection, Keele.

Day 352 : Iodyrite (or iodargyrite – silver iodide) is the greeny yellow mineral to the right of the image.  From Broken Hill Mines, New South Wales, Australia.  Cotton collection, Keele. 

Day 351 : Embolite, or more properly bromian chlorargyrite, from Broken Hill Mines, New South Wales, Australia.  Cotton collection, Keele.

Day 350 : Schwartzembergite, an unusual secondary lead mineral from weathering in arid regions, containing trivalent iodine. From Sierra Gorda, Antofagasta, Chile. Cotton collection, Keele.

Day 349 : Cryolite (sodium aluminium fluoride) from the Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Firth, Arsuk, Greenland. Cotton collection, Keele.

Day 348 : Percyite. Arguably not a mineral in its own right but a mixture of boleite and pseudobolite (lead-copper hydroxyhalide). From La Compañia Mine, Caracoles, Sierra Gorda, Chile.  Cotton collection, Keele.

Day 347 : Botallockite from its type locality at Wheal Cock, Botallack Mine, Botallack, St Just, St Just District, Cornwall, England.  Cotton collection, Keele.