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Diamond Anthracite Collieries Ltd

The company that owned the Diamond anthracite colliery at Ystradgynlais by 1921, after the Diamond Anthracite Mine Company and the New Diamond Colliery Company.

Mines operated

MineRegionYears
Diamond Colliery Powys ?–?

Record created: 6 October 2026 · Last researched: 6 October 2026

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