Welsh Minerals

Gold in quartz, Clogau St Davids Mine, Bontddu, Dolgellau Gold Belt, Gwynedd, Wales, 20 x 12 x 12 mm	Fluorite and sphalerite, Halkyn, Flintshire, 27 mm x 25 mm x 13 mm	Fluorite, 7 x 6 cm with crystals to about 17 mm on edge, from Bryngwiog Mine, Halkyn Mountain.	Chalcocite crystals in calcite with quartz, Dolyhir Quarry, Wethel, Old Radnor, Powys, Wales, UK	Welsh millerite, 65 x 50 x 45 mm, Coed Ely Colliery, Llandtrisant, Glamorgan, Wales.
Detail of Coed Ely millerite, field of view width of 2 cm.	Millerite illustrated in Sowerby (1809)	5 mm brookite crystal, with quartz and albite, Twll Maen Grisial, Fron Olau, Prenteg, Dolbenmaen, Gwynedd	Prenteg brookite model	Prenteg brookite model with Millers
Anatase from Twll Maen Grisial, Fron Olau, Prenteg, Dolbenmaen, Gwynedd, about 2 mm across	Crystal model for Prenteg anatase	Anatase on albite, Hendre Quarry, Glyn Ceiriog, Denbighshire, 40 mm x 20 mm x 15 mm	Chalcophanite on pyrolusite, Drosgol Mine, Nant-y-Moch Reservoir area, Ponterwyd, Trefeirig, Ceredigion, 45 mm x 28 mm x 33 mm	Calcite, Taff's Well Quarry, Cardiff, 45 mm x 45 mm x 43 mm
Calcite, Taff's Well Quarry, Cardiff, 45 mm x 45 mm x 43 mm	Model for Taff's Well "fat" calcite	Fine Taff's Well Quarry calcite twin, scalenohedra composed of multiple stacked rhombohedra. 95 mm x 75 mm x 40 mm	Sharp lustrous compound scalenohedra of calcite composed of stacked rhombohedra, Ton Mawr Quarry, Pentrych, Cardiff	Siderite, chalcopyrite, quartz, Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, 32 mm x 20 mm x 20 mm
Cerussite twins to 15 mm (overall specimen 75x70x25 mm), Logaulas Mine, Ysbyty Ystwyth, Ceredigion, Wales	Crystal model for Logaulas Mine cerussite	Crystal model for Logaulas cerussite twins	Machen Quarry cerussite twins with cockscomb baryte on galena, 40 x 30 x 22 mm	Pen-y-Clun mine, Llanidloes, flattened lenticular pseudohexagonal twins to 12 mm in an 85 x 75 x 60 mm specimen.
Llanidloes witherite detail	Crystal model for lenticle shaped pseudo hexagonal twins of witherite	Welsh witherite encrusted with calcite, 45 x 35 x 20 mm, A 4119 roadcut, Llantrisant, Glamorgan, Wales.	Azurite crystals on calcite, Dolyhir Quarry, Wethel, Old Radnor, Powys, Wales, UK	Ewaldite hexagonal crystal, about 2 mm, Dolyhir Quarry, Wethel, Old Radnor, Powys, Wales, UK
Synchysite-(Ce), Cwmorthin Quarry, Tanygrisiau, Blaenau Ffestiniog, Gwynedd, Wales, UK	Linarite sprays of crystals on quartz, 18 mm x 14 mm x 12 mm, Nant-Y-Cagel Mine, Wales	Linarite sprays of crystals on quartz, 18 mm x 14 mm x 12 mm, Nant-Y-Cagel Mine, Wales	Crystal model for Eaglebrook linearity	Anglesite crystals to 3 mm, Parys Mountain Copper Mine, Anglesey, Wales
Anglesite crystals, Parys Mountain Copper Mine, Anglesey, Wales	Anglesite crystals, Parys Mountain Copper Mine, Anglesey, Wales	Model to explain the crystal form seen in the Parys anglesite specimen shown here	Sowerby (1806) illustration of anglesite crystals from Parys Mountain Mines	Baryte crystals to 12 mm on calcite druse, 55 x 53 x 22 mm, Taffs Well Quarry, Cardiff, Wales
Serpierite, Dylife Mine, Dylife, Machynlleth, Powys, 48 mm x 27 mm x 30 mm	Langite crystals to 1mm on 53 mm matrix from Lodge Park copper trials, near Furnace, Wales.	Langite crystals to 1mm on 53 mm matrix from Lodge Park copper trials, Tre’r-ddol, Ceredigion	Model of twinned langite crystals from smorf.nl	Langite snowflake twins
Langite snowflake twin model	Pyromorphite, Bwlch Glas Mine, Talybont, Ceulanymaesmawr, Ceredigion, Wales, UK	Pyromorphite, Bwlch Glas Mine, Talybont, Ceulanymaesmawr, Ceredigion, Wales, crystals to 6 mm	Paracelsian crystal, 2 cm, Benallt manganese mine, collected 1911 by Arthur Russell.	Paracelsian crystal model
Quartz, St David's Head, Pembrokeshire, 53 mm x 30 mm x 25 mm	Hemimorphite crystals to 3 mm on galena, Machen Quarry, Wales. ex. Dr. Jom Cann collection, 65 x 50 x 40 mm.	Machen hemimorphite crystal model	Machen hemimorphite crystal model	Localities Wales