The brick is made from the local red clay, Etruria marl, which when fired at a high temperature in a low-oxygen reducing atmosphere takes on a deep blue colour and attains a very hard, impervious surface with high crushing strength and low water absorption.
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Staffordshire blue brick is a strong type of construction brick, originally made in Staffordshire, England.
Staffordshire | NYPD Blue | Toronto Blue Jays | Blue Peter | Blue | Blue Ridge Mountains | Blue Öyster Cult | Blue Note Records | Blue Heelers | Pokémon Red and Blue | Winnipeg Blue Bombers | Blue Nile | Staffordshire University | Blue's Clues | ''Pokémon Red'' and ''Blue'' | Hanley, Staffordshire | Brick Lane | brick | Blue Man Group | Vida Blue | The Blue Danube | Rhapsody in Blue | blue plaque | Blue Mountain State | Blue Cheer | Blue Bloods | Blue Beetle | Ateneo Blue Eagles | Project Blue Book | Blue Hill, Maine |