Calcite, CaCO3. Nantiago mine, Central Wales Orefield. A wedge of calcite displaying cleavage in three directions, parallel to the rhombohedral form. The two outer faces have a coating about 1mm. thick, grey in colour, and scaly in appearance, sometimes overlapping as in fish scales. Calcite is abundant as a gangue mineral at this mine.
Pyromorphite, a secondary mineral of lead, Pb5(PO4)5CL. Aberdaunant mine, Central Wales Orefield. Apple green in a globular habit with a sub-columnar structure. The base rock is coated with a mixture of quartz, galena, and goethite/haematite. Pyromorphite is also found at this mine as small barrel shaped crystals, and as encrustations.
Pyromorphite, a secondary mineral of lead, Bb5(PO4)3Cl. Aberdaunant mine, Central Wales Orefield. Apple green, barrel shaped crystals, scattered haphazardly on a base rock which is liberally coated with a mixture of quartz, galena, and goethite/hematite. Pyromorphite is also found at this mine in globular form, or as encrustations.
Baryte, Barium sulphate, BaSO4. Bryntail mine, Nr. Llanidloes, Central Wales Orefield. Pinkish, platey crystals of baryte lining a vugh in a piece of massive baryte. The other half of the vugh is also in my collection.
Baryte, Barium sulphate, BaSO4. Bryntail mine, Nr.Llanidloes, Central Wales Orefield. Pinkish, platey crystals of baryte lining a vugh in a piece of massive baryte. The other half of the vugh is also in my collection. This is a close up of Baryte vugh 1.