Galena

Lead sulphide (PbS), the principal ore mineral of lead — a heavy, brittle mineral that breaks along a distinctive cubic cleavage into bright, silvery-grey cubes.

Historical usage

Galena has been worked across Britain's lead orefields since Roman times — 'pigs' of lead stamped with the Emperor Trajan's name survive from the Yorkshire Dales, and mining in the Halkyn-Minera district of north-east Wales dates from the same period — with major activity through the 16th to 18th centuries building to a 19th-century peak across the Pennines, Mendips, Wales and Scotland's Southern Uplands.

How it worked

Its heavy weight, metallic lustre and perfect cubic cleavage make galena straightforward to recognise in hand specimen, which let prospectors trace mineral veins by eye. In districts like the Mendips it occurred as thin crusts, bands or crystals within narrow veins known as rakes, mixed with worthless gangue minerals such as calcite and barytes; early miners worked weathered, rounded secondary galena accumulated near the surface before deeper, harder primary veins had to be tackled with shafts.

Why it was used

Galena was, in practice, the only commercially important lead ore worked in Britain, and at some localities — notably Charterhouse in the Mendips — it carried enough silver to be valuable for cupellation as well as for its lead content.

Risks & limitations

Ore quality and silver content varied significantly by locality, directly affecting a mine's profitability; smelting galena releases poisonous sulphur dioxide gas and volatilised lead fumes, a hazard managed only crudely, if at all, in early smelting.

Regional variation

Worked across virtually every English, Welsh and Scottish lead orefield — the Pennines, Mendips, Peak District, North and Mid-Wales, and the Southern Uplands — though silver content and vein character varied considerably between districts.

Images

Mines associated with this term

Included only where MineArchive's own research gives a reasonable evidential basis — not every mine where this might plausibly apply.

• Duntanlich Mine — Perth and Kinross (well documented example)
  Named in this record’s geology: “…ore deposits; mineral records for the site also note associated galena.”
• Blackdene Mine — County Durham (well documented example)
  Named twice in this record, first in the history: “…up to around 6 cm across, frequently associated with bright modified galena crystals.”
• New Glencrieff Mine — Dumfries and Galloway (well documented example)
  Named in this record’s history: “…(zinc ore) becoming an increasingly important product alongside galena from the later 19th century onward. New Glencrieff closed in 1931,…”
• Priddy (St Cuthbert's) Lead Works — Somerset (well documented example)
  Named in this record’s geology: “The ore, principally galena, was won from veins within the Triassic Dolomitic Conglomerate of…”

Sources

1. (primary) Galena — Amgueddfa Cymru — National Museum Wales
2. (primary) Lead ore and mines — British Geological Survey (Foundations of the Mendips)

Record created: 27 August 2026 · Last researched: 27 August 2026