Baryte. From Ale and Cakes Mine, Gwennap, Cornwall. J.C. Williams collection. 

Baryte. United Mines, Gwennap, Cornwall.

Baryte. From Wheal Mary Ann, Menheniot, Cornwall. J.C. Williams collection. 

Baryte. From Mount Wellington, Gwennap, Cornwall. Richard Barstow collection.

Tourmaline in quartz. From Cornwall. Philip Rashleigh collection.

Baryte. From Peak Hill, Sidmouth, Devon. D. Green collection. 

Baryte. From Wheal Basset, Illogan, Cornwall.

Tourmaline and quartz. From Devon, England. James Wickett collection.

Tourmaline with chalcopyrite. From Luxulyan, Cornwall. James Wickett collection.

Tourmaline. From Gwennap, Cornwall. Philip Rashleigh collection. 

Tourmaline on quartz. From Bovey Tracey, Devon.

Tourmaline. From Chudleigh, Bovey Tracey, Devon. J.C. Williams Collection. 

Tourmaline in mica. From St Dennis, Cornwall. Philip Rashleigh collection.

Chlorite. Prospidnick Mine, Sithney, Cornwall. J.H. Collins collection. 

Tourmaline. From Tresibble Moor, Roche, Cornwall. James Wickett collection.

Orthoclase feldspar in granitic rock with smoky quartz, mica, tourmaline. From Chywoon Quarry, Longdowns, Cornwall.

Dolomite on sphalerite and galena. From Treburgett Mine, St Teath, Cornwall. Richard Barstow collection. 

Dolomite. From Bere Alston, Devon. 

Dolomite. From Devon.

Dolomite, fluorite, quartz, pyrite and galena. From South Tamar Mine, Landulph, Cornwall. 

Dolomite. From Geevor Mine, St Just in Penwith, Cornwall. Richard Barstow collection.