Lochaline Mine

Overview

An underground silica sand mine on the Morvern peninsula, working an exceptionally pure white Cretaceous sandstone first developed urgently in 1940 to supply Britain's wartime optical-glass industry, and still the only underground sand mine in Europe.

History

The deposit was first identified as a potential source of glass sand in 1895, but was judged uneconomic against cheap Belgian and German imports. That changed in 1940, when the Second World War cut off continental supplies of optical-quality glass sand needed for binoculars, periscopes and gunsights; Lochaline's exceptionally pure, low-iron sandstone was put into production within the year under Tilcon Lochaline Limited.

Geology

The sandstone was laid down on the shore of a tropical sea around 93 million years ago, in the middle of the Cretaceous period — the same episode of deposition that produced the chalk of the White Cliffs of Dover. Cretaceous rock is otherwise almost entirely absent from Scotland, having been stripped away everywhere else by later erosion, making the Lochaline deposit a geological rarity as much as an industrial one.

Workings

The sandstone is worked underground by stoop-and-room mining, extracted through a series of adits driven into the hillside above the shore of Loch Aline, rather than by open quarrying.

What remains

Operated by Tarmac until closure in 2008; reopened in 2012 under Lochaline Quartz Sand Ltd, a joint venture between the Italian minerals group Minerali Industriali and glass manufacturer NSG Group, and remains in production.

Abandoned workings can be dangerous — unstable ground, uncapped shafts, flooding and bad air are common even where a site looks safe from the surface. This entry describes history and general location only; it is not an access guide.

Recorded claims

Individual factual claims, each attached to the source(s) that support it below. Where sources disagree, both are kept.

• The deposit was first identified as a potential glass-sand source in 1895 but judged uneconomic against cheap continental imports; production only began in 1940 once the Second World War cut off those supplies. (high) ^1,2
• The sandstone was deposited in the middle Cretaceous period, around 93 million years ago, at the same time as the chalk of the White Cliffs of Dover — a rare surviving patch of Cretaceous rock in Scotland. (high) ¹
• The mine closed in 2008 under Tarmac and reopened in 2012 under Lochaline Quartz Sand Ltd, a joint venture of Minerali Industriali and NSG Group. (high) ¹

Photographs & further reading

This page doesn't try to reproduce everything — these are the best original sources found for this mine.

Images

Sources

1. (secondary) Lochaline Mine — Wikipedia
2. (secondary) A Unique Resource — Agg-Net
3. (observational) Silica sand mine at Lochaline (Secret Scotland) — Secret Scotland
4. (primary) Mine plan: TILCON LOCHALINE LIMITED — Plan of Silica Sandstone Workings — BGS mine plans catalogue (Survey Plan SP1514)

Record created: 25 August 2026 · Last researched: 25 August 2026