Ganister

SymbolSiO₂ (>90%)

This is a short overview. For the background — history, value over time and notable mines — see Ganister →

A very hard, fine-grained, silica-rich sandstone found beneath certain coal seams, prized for its ability to withstand extreme heat. Crushed and reformed into silica bricks, it was the standard refractory lining for the furnaces of the iron and steel industry.

Mines

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MineRegionWorked
Branthwaite Colliery Cumbria By 1852, possibly earlier–1921
Butsfield Quarry County Durham from By 1922
Commondale Quarry North Yorkshire 1860–1947
Gillhead Colliery Cumbria By 1860s–1959
Healeyfield Mine County Durham Working by the late 18th century–1930
Houseslip Mine County Durham to 7 April 1924
Stocksbridge Colliery South Yorkshire 1861–April 1948
Viewly Hill Ganister Quarry County Durham By 1921–1923
Wharncliffe Wood Ganister Mines South Yorkshire 1860s–c. 1945

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