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Day 266 : Smaltite (cobalt [with iron and nickle] arsenide). From Saxony, Germany.

Day 265 : Arsenopyrite from Freiberg, Saxony, Germany. Cotton collection, Keele.

Day 264 : Löllingite (iron arsenide) from Penlee Quarry, Paul, Newlyn, Cornwall, England.  Cotton collection, Keele.

Day 263 : Stibnite (Antinomy Sulphide) in barytes. Stibnite’s name comes from stibium, the old name for antinomy.  From Baia Sprie, Romania. Cotton collection, Keele.

Day 262 : Sylvanite is a gold (and silver) telluride. Sylvanium (from Transylvania where it was found) was one of the names proposed for what we now call tellurium.  This sample from Baia de Arie?, Transylvania, Romania.  Cotton collection, Keele

Day 261 : Chalcociste (Copper Sulphide) Carn Brea Mine, Illogan, Cornwall, England. Cotton collection, Keele.

Day 260 : Orpiment (arsenic sulphide) from Bohemia. Cotton collection, Keele.

Day 259 : At the Enhancing Fieldwork Learning meeting at Preston Monford Field Studies Centre, Shropshire. Lower section of coarse angular glacio-fan material with glacio-lacustrine laminated sediments in the upper part, exposed on the side of the River Severn. 

Day 258 : Chalcopyrite (copper-iron sulphide) from St Agnes, Cornwall.  Cotton collection, Keele.

Day 257 : Djurleite (Cu31S16) from Cannington Park Quarry, Somerset, England.  Cotton collection, Keele.