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

Sphalerite - a group of well developed black prismatic crystals - largest face 1.5cm - on matrix - from New Glencrieff Mine, Wanlockhead, Dumfriesshire

Sphalerite - well developed black crystals - with cream dolomite crystals on matrix - partially frosted by white quartz - from New Glencrieff Vein, Wanlockhead Mine, Dumfriesshire

Sphalerite - well developed black prismatic crystals associated with white calcite crystals; one double terminated, over cream dolomite crystals - from New Glencrieff Mine, Wanlockhead, Dumfriesshire

Sphalerite - dark honey-brown translucent prismatic crystals - associated with galena - from from Pribram, Bohemia, Czech Republic, Czechoslovakia

Sphalerite - dark grey-black prismatic, form d, m crystals - associated with calcite and quartz - found in a vein in ordovician rocks - possibly from Wanlockhead, Dumfriesshire

Sphalerite - dark grey-black prismatic crystals - associated with quartz on a vein in ordovician rocks - from Wanlockhead, Dumfriesshire

Sphalerite - dark grey-black prismatic crystals on a quartz matrix - found in a vein in ordovician rocks - from Wanlockhead, Dumfriesshire

Sphalerite - dark grey-black prismatic crystals on a calcite matrix - found in a vein in ordovician rocks - from Wanlockhead, Dumfriesshire

Sphalerite - dark grey-black prismatic crystals - associated with dolomite and quartz - from Wanlockhead, Dumfriesshire

Sphalerite - dark grey prismatic crystals on a quartz matrix - from Wanlockhead, Dumfriesshire

Sphalerite - grey-black prismatic crystals, form d, o - running to massive - associated with galena and cerussite - from Wanlockhead, Dumfriesshire