Coal; One of a collection of rocks and minerals from Southern Africa - a sample of coal from Rivulet Natole above Tete, the first indication of true coal Dr Livingstone found in coming east

One of a collection of rocks and minerals from Southern Africa - samples of coal from River Revubue opposite Tete, north

Bromargyrite - purple-grey waxy veins - associated with chlorargyrite in matrix - originally registered as Embolite, a chloride and bromide of silver - from Chanarcillo, South of Copiapo, Atacama Province, Chile, SOUTH AMERICA

Coal; a block of black 'little splint' coal with a tree bark-like texture, one of a group of specimens of coal and associated rocks taken from different parts of the bore of the Minto Pit of the Lochgelly Iron and Coal Co, Brigghills Farm, Lochgelly, Fife

Cassiterite - grey aggregated crystals - a sample of tin ore containing 73% metallic tin - from the Rooiberg Tin Mine, Waterberg District, Transvaal, South Africa -

Ingot of Scottish silver smelted from vein ore from a trial prospect at the Calliachar Burn, Bolfracks Estate, near Aberfeldy, Perthshire.

Gold - an ingot of Scottish gold smelted from vein ore from a trial prospect at the Calliachar Burn, Bolfracks Estate, near Aberfeldy, Perthshire.

Gold - coarse alluvial - from Borland Glen, Glendevon, Ochil Hills, Perthshire.

Gold - coarse visible flakes contained in quartz - from Calliachar Burn, Aberfeldy, Perthshire.

Calcite - pale orange-pink to colourless crystals - associated with hematite on matrix - from Waygate Shaft, Straitsteps Mine, Wanlockhead, Dumfriesshire

Galena - dull grey metallic - shelved - associated with quartz crystals - from Wanlockhead, Dumfriesshire.

Galena - massive - silver-grey metallic - associated with fine cerussite and quartz crystals - probably from Wanlockhead, Dumfriesshire.

Greenockite - fine encrustations of yellow-green crystals on sphalerite - probably from Wanlockhead, Dumfriesshire

Galena - a single silver-grey crystal - associated with pyrite and quartz - from Wanlockhead, Dumfriesshire.

Nickeline - massive, bronze-metallic in quartz - from No. 8 level, Wanlockhead, Dumfriesshire

Galena - a single dull grey metallic crystal associated with quartz - from Wanlockhead, Dumfriesshire.