Arsenic. From Burraton Combe Quarry, St Stephens by Saltash, Cornwall. Richard Barstow collection. 

Arsenopyrite. From St Agnes, Cornwall. 

Arsenopyrite. From Hingston Down Quarry, Gunnislake, Cornwall. Richard Barstow collection. 

Arsenic. From Burraton Combe Quarry, St Stephens by Saltash, Cornwall. Arthur Russell collection. 

Lollingite on quartz. From Penlee Quarry, Penzance, Cornwall. Richard Barstow collection.

Arsenopyrite with albite and quartz. From Penlee Quarry, Penzance, Cornwall.

Arsenopyrite with quartz. From Wheal Rosewarne, Gwinear, Cornwall. James Wickett Collection.

Arsenopyrite. From Cornwall.

Arsenopyrite with chalcocite. From St Ives Consols, St Ives, Cornwall. James Wickett collection.

Arsenopyrite and fluorite crystals. From Cornwall.

Native bismuth and arsenic with smaltite. From Dolcoath Mine, Camborne, Cornwall. M. Merry Collection.

Arsenopyrite in quartz. From Wheal Jane, Kea, Cornwall.

Arsenopyrite with cassiterite and sphalerite. From Wheal Rosewarne, Gwinear, Cornwall.

Arsenopyrite. From St Agnes, Cornwall. 

Arsenopyrite. From Illogan, Cornwall. 

Skutterudite, chloanthite. From Wheal Anne, Phillack, Cornwall.

Arsenopyrite. From Wheal Jane, Kea, Cornwall. Richard Barstow collection. 

Arsenopyrite. From Poldice Mines, St Day, Cornwall. Philip Rashleigh collection. 

Arsenopyrite with fluorite and quartz. From Hingston Down Quarry, Gunnislake, Cornwall.

Arsenic. From Burraton Combe Quarry, St Stephens by Saltash, Cornwall. Richard Barstow collection. 

Arsenopyrite. From St Ives Consols, St Ives, Cornwall. James Wickett collection. 

Arsenopyrite. From Wheal Rosewarne, Gwinear, Cornwall. James Wickett collection. 

Workers at the arsenic flues, New Mills, around 1900. They have rags stuffed up their noses, but bare arms and no mouth coverings to prevent them from inhaling arsenic.