Cassiterite. From Balleswidden, St Just in Penwith, Cornwall. James Wickett Collection.

Cassiterite with mica. From Wheal Trevaunance, St Agnes, Cornwall. Philip Rashleigh Collection.

Cassiterite. St. Austell Consols, St Stephen in Brannel, Cornwall. Philip Rashleigh Collection.

Cassiterite and gilbertite mica. From Red Moor Mine, Stokeclimsland, Cornwall. James Wickett Collection.

Cassiterite and mica. From Red Moor Mine, Stokeclimsland, Cornwall. James Wickett Collection.

Cassiterite with quartz. From Carclaze Mine, St Austell, Cornwall. Philip Rashleigh Collection.

Cassiterite with mica. From Stennagwyn Mine, St Austell, Cornwall. Philip Rashleigh Collection.

Cassiterite. From Halvinna Mine, Altarnun, Cornwall. Philip Rashleigh Collection.

Cassiterite with minor quartz and tourmaline. From St Austell Consols, St Stephen in Brannel, Cornwall. Richard Barstow Collection.

Cassiterite in mica. From Hemerdon Bal Mine (Drakelands), Plympton, Devon. D Smith Collection.

Cassiterite and quartz on granite. From Wheal Bunnie, Bugle, Cornwall.

Sparable tin. Cassiterite enclosing breccia fragments. From Relistian Mine, Gwinear, Cornwall. M. Merry Collection.

Cassiterite and quartz crystals on greisen. From Beam Mine, Roche, Cornwall. J. C. Williams Collection.