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| Symbol | Mg3Si2O5(OH)4 |
|---|
This is a short overview. For the background — history, value over time and notable mines — see Chrysotile →
The fibrous, serpentine-group form of asbestos, formed within serpentinised ultrabasic rock and valued historically for its long, flexible, heat-resistant fibres. Extremely rare in Wales, with only two documented occurrences, and now recognised as a serious respiratory hazard rather than worked for any purpose.
| Mine | Region | Worked |
|---|---|---|
| Mynachdy (Rhosmynach and Carmel Head Copper Mines) | Anglesey | From 1839–1926 |
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