Orthoclase feldspar, biotite mica and quartz. From Trelavour Downs, St Dennis, Cornwall. 

Bayldonite (deep green crust) on quartz. From Penberthy Crofts, St Hilary, Cornwall. M. Merry collection. 

Iron stained quartz crystals. From Trethosa Clay Pit, St Stephen in Brannel, Cornwall.

Cassiterite on quartz. From Beam Mine at Goonbarrow China Clay Pit, St Austell, Cornwall. Richard Barstow collection.

Danalite on dolerite. From Botallack Mine, St Just, Cornwall. 

Ludlamite in a cavity in quartz. From Wheal Jane, Kea, Cornwall. P. Lowe collection.

Smoky quartz. From Treviscoe Pit, St Stephen in Brannel, Cornwall.

Lollingite in granite. From Tremearne Cliff, Tremearne, Breage, Cornwall. Richard Barstow collection.

Axinite. From Trewellard Mine, St Just, Cornwall.

Liskeardite. From Penberthy Crofts, St Hilary, Cornwall. Richard Barstow collection.

Childrenite on goethite. From Crinnis Beach Mine, St Austell, Cornwall. Richard Barstow collection. 

Cronstedtite with cacoxenite and quartz. From Wheal Jane, Kea, Cornwall. Richard Barstow collection. 

Neotocite. From Wheal Owles, St Just in Penwith, Cornwall.

Allophane. From Hawk’s Wood Mine, North Hill, Cornwall. 

Beudantite. From Wheal Carpenter, Gwinear, Cornwall. Richard Barstow collection.