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Eaglebrook Mine (Nant-Y-Cagel Mine; Dolrhyddlan Mine), Nant-y-Moch Reservoir area, Talybont, Ceulanymaesmawr, Ceredigion (Dyfed; Cardiganshire), Wales, UK

Eaglebrook mine has been known for many years as a site that has produced many fine micros, of mostly basic sulphates of lead, copper, and zinc. Please bear in mind that the site is SSSI (a site once brought to prominence by amateur collectors is now off limits to those that helped the professional institutions).

The mine is quite old, worked by the Company of Mine Adventures sometime around 1700, and continued to be developed until 1722. In 1853 the mine was reopened, but it seems to have been more to sell shares, than to work the mine. However, work did continue until 1865.

There were other short trials until final closure in 1874-5. The mine was developed to a depth of 50 fathoms at the east shaft.

Output is only recorded for the years after 1853, with most ore produced between 1856-59. Recorded output is 598 tons of lead ore and 71 tons of copper ore.





UK OS Grid Reference: SN736892
Map Reference: 52°29'8"N , 3°51'42"W

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Mineral List:
  • Anglesite
  • Ankerite
  • Aurichalcite ?
  • Bechererite
  • Bindheimite
  • Brochantite
  • Calcite
  • Caledonite
  • Cerussite
  • Cesàrolite
  • Chalcocite
  • Chalcophanite
  • Chalcopyrite
  • Chrysocolla
  • Connellite
  • Copper
  • Covellite
  • Cuprite
  • Devilline
  • Dolomite
  • Dundasite
  • Galena
  • Goethite
  • Gold
  • Hemimorphite
  • Hydrozincite
  • Langite
  • Laurionite
  • Lautenthalite
  • Leadhillite ?
  • Limonite
  • Linarite
  • Malachite
  • Marcasite
  • Mattheddleite
  • Millerite
  • Phosgenite
  • Pyrite
  • Pyrolusite
  • Pyromorphite
  • Quartz
  • Ramsbeckite
  • Redgillite
  • Schmiederite ?
  • Schulenbergite
  • Serpierite
  • Siderite ?
  • Siegenite
  • Smithsonite
  • Sphalerite
  • Sulphur
  • Susannite
  • Tučekite
  • 'Unnamed (Basic Zinc Sulfate Hydrate)'
  • 'Wad'
  • Woodwardite
  • Wroewolfeite
  • Wulfenite


    58 entries listed. 55 valid minerals.

    The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
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