Jurassic Marlstone from North Oxfordshire (iron content 24%)
British: Jurassic Marlstone from North Oxfordshire (iron content 24%)
Specimens of British and foreign iron ores
British: Jurassic Marlstone from North Oxfordshire (iron content 24%)
British: sand ironstone from Northamptonshire (iron content 31.8%)
British: Lower liassic ironstone from North Lincolnshire (22% iron)
British: haematite ore from West Cumberland (58% iron)
Foreign: Kiruna ore from Sweden (65% iron)
Foreign: Quenze ore from Algeria (55% iron)
Foreign: Rif Lumpy ore from Morocco (65% iron)
Foreign: Wabana ore from Canada (50% iron)
Foreign: Cerro Bolivar ore from Venezuela (63% iron)