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

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

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

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

Calcite - chalk white crystal aggregates pseudomorph after witherite - from Liverick Vein from a cross cut between High Raise and Trebar Veins, Haggs Mine, Allenheads, Northumberland, England

Massive chalk white albite, pesudomorphous after analcite - from Loanhead Quarry, Beith, Ayrshire

Sphalerite - black crystals in barite matrix - from Strontian Main Vein, Clashgorm open cast workings, Argyll

Sphalerite - massive, in stringers in barite - from Strontian Main Vein, Clashgorm open cast workings, Argyll

Sphalerite - massive - surrounding green quartzite breccia in a matrix of barite and calcite - from Strontian Main Vein, Clashgorm open cast workings, Argyll

Sphalerite - thin brown stringers in matrix - associated with minor quartz and galena - from the old dumps on the left bank of Coldstream Burn Mine, near Newton Stewart, Kirkcudbrightshire

Sphalerite - thin brown stringers in matrix - associated with minor quartz and galena - from old dumps on the left bank of Coldstram Burn Mine, near Newton Stewart, Kirkcudbrightshire

Syenite - a small polished slab - pinkish, coarse-grained, largely composed of alkali feldspar - a with small amount of quartz, plagioclase, hornblende and/or biotite (difficult to distinguish in polished specimen) - original name: Syenites Antiquorum - locality unknown

Syenite - a small polished slab - mainly white, crystalline mineral, probably orthoclase, with numerous aggregates of a dark green, euhedral mineral, probably hornblende - locality unknown

Granite - a small polished slab - very coarse grained, almost pegmatitic - large pink orthoclase crystals form main component with smaller amounts of quartz, orthoclase and biotite - locality unknown

Diorite - a small polished slab - coarse grained, with interlocking crystals of white, subhedral plagioclase and very dark green hornblende - locality unknown

Diorite - a small polished slab - medium grained -largely composed of plagioclase lathes, many of which show zoning - finer grained groundmass composed of more plagioclase and very dark green mineral, probably hornblende or a pyroxene - locality unknown